Update plugin com.android.application to v9.4.0

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
       contents: write
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0 
     
@@ -42,7 +42,7 @@ jobs:
         run: git checkout -B "$BRANCH"
 
       - name: set up JDK
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v6
         with:
           java-version: 21
           distribution: "temurin"
@@ -50,10 +50,27 @@ jobs:
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v6
 
+      - name: Run unit tests
+        run: ./gradlew testDebugUnitTest
+
       - name: Build APK
         run: |
           VERSION_CODE=$(git rev-list --count HEAD)
-          ./gradlew assembleSignedRelease -PVERSION_CODE=$VERSION_CODE
+          VERSION_BASE=$(git describe --tags --abbrev=0 | sed 's/^v//')
+          VERSION_DEV=$(git rev-list --count $(git describe --tags --abbrev=0)..HEAD)
+          if [ $VERSION_DEV -gt 0 ]; then
+            VERSION_NAME="${VERSION_BASE}.${VERSION_DEV}"
+          else
+            VERSION_NAME="${VERSION_BASE}"
+          fi
+          ./gradlew assembleSignedRelease -PVERSION_CODE=$VERSION_CODE -PVERSION_NAME=$VERSION_NAME
+
+      - name: Upload APK
+        uses: actions/upload-artifact@v7
+        with:
+          path: app/build/outputs/apk/signedRelease/app-signedRelease.apk
+          compression-level: 0
+          archive: false
 
       - name: Release
         uses: softprops/action-gh-release@v3

.gitignore

@@ -23,3 +23,5 @@ captures/
 local.properties
 keystore.properties
 key.jks
+# generated map intermediates; the packed .bmap in assets is what ships
+mapdata/*.geojson

app/build.gradle

@@ -1,8 +1,7 @@
 plugins {
     id 'com.android.application'
-    id 'org.jetbrains.kotlin.plugin.serialization' version '2.4.0'
+    id 'org.jetbrains.kotlin.plugin.serialization' version '2.4.10'
-    id 'org.jetbrains.kotlin.plugin.compose' version '2.4.0'
+    id 'org.jetbrains.kotlin.plugin.compose' version '2.4.10'
-    id 'com.mikepenz.aboutlibraries.plugin' version '14.2.1'
 }
 
 android {
@@ -15,7 +14,7 @@ android {
         applicationId 'net.helcel.beans'
         minSdk = 28
         targetSdk = 37
-        versionName "1.3b"
+        versionName project.hasProperty('VERSION_NAME') ? project.property('VERSION_NAME') : "1.5"
         versionCode project.hasProperty('VERSION_CODE') ? project.property('VERSION_CODE').toInteger() : 1
     }
     signingConfigs {
@@ -74,44 +73,35 @@ android {
         kotlinCompilerExtensionVersion = "2.2.20"
     }
 
+    androidResources {
+        // The app ships English strings only; without this the libraries drag
+        // in some eighty locales of their own.
+        localeFilters += ["en"]
+    }
+
     lint {
         disable 'UsingMaterialAndMaterial3Libraries'
     }
 
 }
-aboutLibraries {
-    library {
-        exclusionPatterns = [~"androidx.*", ~"com.google.android.*", ~"org.jetbrains.*"]
-    }
-}
 
 dependencies {
     implementation 'androidx.compose.material3:material3:1.4.0'
-    implementation "androidx.compose.material:material:1.11.2"
+    implementation "androidx.compose.material:material:1.12.0"
     implementation 'androidx.compose.material:material-icons-extended:1.7.8'
-    implementation 'androidx.navigation:navigation-compose:2.9.8'
+    implementation 'androidx.navigation:navigation-compose:2.10.0'
     coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs_nio:2.1.5'
 
     implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.11.0'
 
-    implementation 'androidx.preference:preference-ktx:1.2.1'
     implementation 'androidx.compose.ui:ui'
     implementation "androidx.activity:activity-ktx:1.13.0"
 
     implementation 'androidx.compose.ui:ui-tooling-preview'
-    implementation 'com.google.android.material:material:1.14.0'
-    implementation 'org.jetbrains.kotlinx:kotlinx-serialization-json:1.11.0'
-
-    implementation 'com.caverock:androidsvg-aar:1.4'
-    implementation 'com.github.chrisbanes:PhotoView:2.3.0'
-
-    implementation 'com.mikepenz:aboutlibraries:14.2.1'
-    implementation 'com.mikepenz:aboutlibraries-compose-m3:14.2.1'
-    implementation 'com.mikepenz:aboutlibraries-core:14.2.1'
 
 
-    implementation platform('androidx.compose:compose-bom:2026.05.01')
+    implementation platform('androidx.compose:compose-bom:2026.08.00')
-    debugImplementation 'androidx.compose.ui:ui-tooling:1.11.2'
+    debugImplementation 'androidx.compose.ui:ui-tooling:1.12.0'
 }
 
 tasks.configureEach { task ->

app/src/main/java/net/helcel/beans/activity/MainScreen.kt

@@ -1,20 +1,20 @@
 package net.helcel.beans.activity
 
-import android.graphics.drawable.PictureDrawable
 import android.os.Bundle
-import android.widget.ImageView
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.navigationBarsPadding
 import androidx.compose.foundation.layout.statusBarsPadding
+import androidx.compose.material.CircularProgressIndicator
 import androidx.compose.material.Icon
 import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.Scaffold
-import androidx.compose.material.Surface
 import androidx.compose.material.Text
 import androidx.compose.material.TopAppBar
 import androidx.compose.material.icons.Icons
@@ -22,29 +22,42 @@ import androidx.compose.material.icons.filled.Edit
 import androidx.compose.material.icons.filled.Percent
 import androidx.compose.material.icons.filled.Settings
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.toArgb
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.viewinterop.AndroidView
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.rememberNavController
-import com.caverock.androidsvg.RenderOptions
-import com.github.chrisbanes.photoview.PhotoView
 import net.helcel.beans.BuildConfig
+import net.helcel.beans.activity.sub.EditPlaceDialog
+import net.helcel.beans.activity.sub.MapPickDialog
+import net.helcel.beans.activity.sub.applyDirectVisit
+import net.helcel.beans.activity.sub.commitVisitDialog
+import net.helcel.beans.countries.GeoLoc
 import net.helcel.beans.countries.GeoLocImporter
+import net.helcel.beans.countries.GeoLocTree
 import net.helcel.beans.helper.Data
 import net.helcel.beans.helper.Settings
-import net.helcel.beans.svg.CSSWrapper
+import net.helcel.beans.map.MapAssets
-import net.helcel.beans.svg.SVGWrapper
+import net.helcel.beans.map.MapStyle
+import net.helcel.beans.map.MapView
+import net.helcel.beans.map.MapWorld
+import net.helcel.beans.map.MapReader
 
 
 class MainScreen : ComponentActivity() {
 
-    private lateinit var psvg: SVGWrapper
+    private var world by mutableStateOf<MapWorld?>(null)
-    private lateinit var css: CSSWrapper
+    private var loadToken = 0
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -53,29 +66,38 @@ class MainScreen : ComponentActivity() {
         Data.loadData(this, Int.MIN_VALUE)
         GeoLocImporter.importStates(this)
 
+        refreshProjection()
+
         setContent {
             SysTheme {
-                Box(modifier = Modifier.fillMaxSize().background(MaterialTheme.colors.primary).statusBarsPadding(),) {
+                // Both bars: without the navigation inset the system buttons sit on top of
-                    AppNavHost(psvg, css)
+                // whatever is at the bottom of a screen, such as the About button.
+                Box(
+                    modifier = Modifier
+                        .fillMaxSize()
+                        .background(MaterialTheme.colors.primary)
+                        .statusBarsPadding()
+                        .navigationBarsPadding(),
+                ) {
+                    AppNavHost()
                 }
             }
         }
-        refreshProjection()
     }
 
     @Composable
-    fun AppNavHost(psvg: SVGWrapper, css: CSSWrapper) {
+    fun AppNavHost() {
         val navController = rememberNavController()
         NavHost(navController, startDestination = "main") {
-            composable("main") { MainScreenC(psvg,css, navController) }
+            composable("main") { MainScreenC(world, navController) }
-            composable("settings") { SettingsMainScreen { navController.navigate("main")} }
+            composable("settings") { SettingsMainScreen { navController.navigate("main") } }
             composable("edit") { EditScreen { navController.navigate("main") } }
             composable("stats") { StatsScreen { navController.navigate("main") } }
         }
     }
 
     @Composable
-    fun MainScreenC(psvg: SVGWrapper,css: CSSWrapper, nav: NavHostController){
+    fun MainScreenC(world: MapWorld?, nav: NavHostController){
         SysTheme {
             Scaffold(
                 topBar = {
@@ -95,34 +117,87 @@ class MainScreen : ComponentActivity() {
                     )
                 }
             ) { innerPadding ->
-                Box(modifier = Modifier.padding(innerPadding)) {
+                Box(modifier = Modifier.padding(innerPadding).fillMaxSize()) {
-                    MapScreen(psvg, css)
+                    if (world == null) LoadingMap() else MapScreen(world)
                 }
             }
         }
     }
 
     @Composable
-    fun MapScreen(psvg: SVGWrapper, css: CSSWrapper) {
+    fun LoadingMap() {
-        Box {
+        Box(
-            val opt: RenderOptions = RenderOptions.create()
+            modifier = Modifier.fillMaxSize().background(MaterialTheme.colors.background),
-            opt.css(css.get())
+            contentAlignment = Alignment.Center,
-            val drawable = remember(psvg, css) {
+        ) {
-                PictureDrawable(psvg.get()?.renderToPicture(opt))
+            CircularProgressIndicator(
-            }
+                color = MaterialTheme.colors.primary,
-            AndroidView(factory = { ctx ->
+                strokeWidth = 4.dp,
-                PhotoView(ctx).apply {
+                modifier = Modifier.size(50.dp),
-                    setLayerType(ImageView.LAYER_TYPE_SOFTWARE, null)
+            )
-                    setImageDrawable(drawable)
-                    maximumScale = 32f
-                    scaleType = ImageView.ScaleType.FIT_CENTER
-                }
-            }, modifier = Modifier.fillMaxSize())
         }
     }
 
+    @Composable
+    fun MapScreen(world: MapWorld) {
+        val ctx = LocalContext.current
+        val visits by Data.visits.visitsFlow.collectAsState()
+        val groups by Data.groups.groupsFlow.collectAsState()
+        val land = MaterialTheme.colors.onBackground.toArgb()
+        val background = MaterialTheme.colors.background.toArgb()
+        val style = remember(visits, groups, land, background) {
+            MapStyle.build(ctx, land, background)
+        }
+        val touchRadius = Settings.getTouchRadius(ctx)
+
+        var candidates by remember { mutableStateOf<List<GeoLoc>>(emptyList()) }
+        var showColor by remember { mutableStateOf(false) }
+
+        // A place is either applied straight away, or the colour dialog picks
+        // the group for it, exactly as it does from the edit list.
+        fun select(loc: GeoLoc) {
+            if (!applyDirectVisit(ctx, loc)) showColor = true
+        }
+
+        if (candidates.isNotEmpty()) {
+            MapPickDialog(
+                candidates = candidates,
+                onPick = { candidates = emptyList(); select(it) },
+                onDismiss = { candidates = emptyList() },
+            )
+        }
+        if (showColor) {
+            EditPlaceDialog(false) { cleared ->
+                showColor = false
+                commitVisitDialog(cleared)
+            }
+        }
+
+        AndroidView(
+            factory = { MapView(it) },
+            update = { view ->
+                view.world = world
+                view.style = style
+                view.touchRadiusDp = touchRadius
+                // Always the tree, even for a single hit: landing on a region is
+                // just as often a way of reaching the country around it.
+                view.onPick = { picks ->
+                    val locs = picks.mapNotNull { GeoLocTree.find(it.code) }
+                    if (locs.isNotEmpty()) candidates = locs
+                }
+            },
+            modifier = Modifier.fillMaxSize()
+        )
+    }
+
+    /** Reloads the map asset, on a worker thread since it is a few megabytes. */
     fun refreshProjection() {
-        psvg = SVGWrapper(this)
+        val asset = MapAssets.assetFor(this)
-        css = CSSWrapper(this)
+        val token = ++loadToken
+        world = null
+        Thread {
+            val parsed = assets.open(asset).use { MapReader.read(it) }
+            runOnUiThread { if (token == loadToken) world = parsed }
+        }.start()
     }
 }

app/src/main/java/net/helcel/beans/activity/SettingsScreen.kt

@@ -26,6 +26,7 @@ import androidx.compose.material.IconButton
 import androidx.compose.material.MaterialTheme
 import androidx.compose.material.RadioButton
 import androidx.compose.material.Scaffold
+import androidx.compose.material.Slider
 import androidx.compose.material.Text
 import androidx.compose.material.TopAppBar
 import androidx.compose.material.icons.Icons
@@ -37,6 +38,7 @@ import androidx.compose.material3.dynamicLightColorScheme
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
@@ -48,10 +50,6 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.window.Dialog
-import androidx.preference.PreferenceManager
-import net.helcel.beans.R
-import net.helcel.beans.countries.GeoLocImporter
-import net.helcel.beans.helper.Settings
 import androidx.core.content.edit
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
@@ -60,18 +58,23 @@ import androidx.navigation.compose.rememberNavController
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import net.helcel.beans.R
 import net.helcel.beans.activity.sub.AboutScreen
 import net.helcel.beans.activity.sub.EditPlaceColorDialog
-import net.helcel.beans.activity.sub.EditPlaceDialog
+import net.helcel.beans.countries.GeoLocImporter
-import net.helcel.beans.activity.sub.LicenseScreen
+import net.helcel.beans.helper.DEFAULT_TOUCH_RADIUS
 import net.helcel.beans.helper.Data
+import net.helcel.beans.helper.defaultPreferences
+import net.helcel.beans.helper.MAX_TOUCH_RADIUS
+import net.helcel.beans.helper.Settings
+import kotlin.math.roundToInt
 
 @Composable
 fun SysTheme(
     content: @Composable () -> Unit
 ) {
     val context = LocalContext.current
-    val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+    val prefs = defaultPreferences(context)
     val themeKey = prefs.getString(stringResource(R.string.key_theme), stringResource(R.string.system))
     val darkTheme = when (themeKey) {
         stringResource(R.string.system) -> isSystemInDarkTheme()
@@ -100,28 +103,22 @@ fun SysTheme(
         isLight = !darkTheme,
     )
 
-    MaterialTheme(
+    // Both, because the app mixes the two: most of it is Material 2, while the
-        colors = m2colors,
+    // dividers are Material 3 and would otherwise fall back to the default
-        content = content
+    // light scheme.
-    )
+    androidx.compose.material3.MaterialTheme(colorScheme = colorScheme) {
-}
+        MaterialTheme(
-
+            colors = m2colors,
-
+            content = content
-@Composable
+        )
-fun settingsNav(): NavHostController {
-    val navController = rememberNavController()
-    NavHost(navController, startDestination= "settings"){
-        composable("settings"){SettingsScreen(navController)}
-        composable("licenses"){ LicenseScreen() }
-        composable("about"){ AboutScreen() }
     }
-    return navController
 }
 
+
 @Preview
 @Composable
 fun SettingsMainScreen(onExit: ()->Unit = {}) {
-    val nav: NavHostController = settingsNav()
+    val nav: NavHostController = rememberNavController()
     SysTheme {
         Scaffold(
             topBar = {
@@ -141,169 +138,64 @@ fun SettingsMainScreen(onExit: ()->Unit = {}) {
                 )
             }
         ) { innerPadding ->
+            // One host, inside the scaffold. Building it here and again as a
+            // default argument left two of them: settings drawn twice, and
+            // only the inner one ever navigating.
             Box(modifier = Modifier.padding(innerPadding)) {
-                SettingsScreen()
+                NavHost(nav, startDestination = "settings") {
+                    composable("settings") { SettingsScreen(nav) }
+                    composable("about") { AboutScreen() }
+                }
             }
         }
     }
 }
 
 @Composable
-fun SettingsScreen(navController: NavHostController = settingsNav()) {
+fun SettingsScreen(navController: NavHostController) {
     val context = LocalContext.current
-    val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+    val prefs = defaultPreferences(context)
     val keyTheme = stringResource(R.string.key_theme)
     val defaultTheme = stringResource(R.string.system)
     val keyProjection = stringResource(R.string.key_projection)
     val keyGroup = stringResource(R.string.key_group)
+    val keyRegional = stringResource(R.string.key_regional)
+    val keyCascadeStats = stringResource(R.string.key_cascade_stats)
+    val keyTouchRadius = stringResource(R.string.key_touch_radius)
     val offString = stringResource(R.string.off)
-
+    val onString = stringResource(R.string.on)
-    var showEdit by remember { mutableStateOf(false) }
 
     var theme by remember { mutableStateOf(prefs.getString(keyTheme, defaultTheme)!!) }
     var projection by remember { mutableStateOf(prefs.getString(keyProjection, "default")!!) }
-    var groups by remember { mutableStateOf(prefs.getString(keyGroup,offString)!!) }
+    var groups by remember { mutableStateOf(prefs.getString(keyGroup, offString)!!) }
-
+    var regional by remember { mutableStateOf(prefs.getString(keyRegional, offString)!!) }
-        if(showEdit)
+    var cascadeStats by remember { mutableStateOf(prefs.getString(keyCascadeStats, offString)!!) }
-            EditPlaceDialog(true) {
+    var touchRadius by remember {
-                showEdit = false
+        mutableIntStateOf(prefs.getInt(keyTouchRadius, DEFAULT_TOUCH_RADIUS))
-                val g = Data.selected_group
-                if (it && g != null) {
-                    Data.visits.reassignAllVisitedToGroup(g.key)
-                    Data.saveData()
-                }
-            }
-
-        LazyColumn(
-            modifier = Modifier
-                .fillMaxSize()
-                .padding(16.dp)
-                .background(MaterialTheme.colors.background)
-        ) {
-            item {
-                Text(
-                    "Theme", style = MaterialTheme.typography.h6,
-                    color = MaterialTheme.colors.onBackground,
-                )
-                MultiPreference(arrayOf(stringResource(R.string.system),stringResource(R.string.light),stringResource(R.string.dark)), theme) { newTheme ->
-                    theme = newTheme
-                    prefs.edit { putString(keyTheme, newTheme) }
-                }
-                HorizontalDivider()
-            }
-            item {
-                Text(
-                    "Map Projection",
-                    style = MaterialTheme.typography.h6,
-                    color = MaterialTheme.colors.onBackground,
-                    modifier = Modifier.padding(top = 16.dp)
-                )
-                MultiPreference(arrayOf(stringResource(R.string.mercator), stringResource(R.string.azimuthalequidistant)), projection) { newProj ->
-                    projection = newProj
-                    prefs.edit { putString(keyProjection, newProj) }
-                    Settings.refreshProjection()
-                }
-                HorizontalDivider()
-            }
-            item {
-                Text(
-                    "Groups",
-                    style = MaterialTheme.typography.h6,
-                    color = MaterialTheme.colors.onBackground,
-                    modifier = Modifier.padding(top = 16.dp)
-                )
-                var showDialog by remember{mutableStateOf(false)}
-                if(showDialog){
-                    EditPlaceColorDialog(
-                        deleteMode = true,
-                        onDismiss = {
-                            val g = Data.selected_group
-                            if (g != null) {
-                                Data.visits.reassignAllVisitedToGroup(g.key)
-                                Data.saveData()
-                            }
-                            showDialog = false
-                        })
-                }
-                MultiPreference(
-                    arrayOf(stringResource(R.string.on), stringResource(R.string.off)),
-                    groups
-                ) { key ->
-                    if (key == offString) {
-                        showDialog=true
-                    }
-                    groups = key
-                    prefs.edit { putString(keyGroup, key) }
-                }
-                HorizontalDivider()
-            }
-            item {
-                Text(
-                    text = "Regional",
-                    style = MaterialTheme.typography.h6,
-                    color = MaterialTheme.colors.onBackground,
-                    modifier = Modifier
-                        .padding(top = 16.dp)
-                        .clickable(onClick = {}),
-                )
-                RegionalScreen()
-                HorizontalDivider()
-            }
-            item{
-                val launcher = rememberLauncherForActivityResult(
-                contract = ActivityResultContracts.OpenDocument(),
-                onResult = { uri -> Data.doImport(context, uri)   }
-                )
-                Row(
-                    modifier = Modifier.fillMaxWidth()
-                ) {
-                    Button(onClick = {
-                        launcher.launch(arrayOf("*/*"))
-                    }, modifier = Modifier
-                        .fillMaxWidth(fraction = 0.4f)
-                        .padding(vertical = 8.dp)) {
-                        Text("Import")
-                    }
-                    Spacer(
-                        modifier = Modifier.fillMaxWidth(0.4f)
-                    )
-                    Button(onClick = {
-                        Data.doExport(context)
-                    }, modifier = Modifier
-                        .fillMaxWidth(fraction = 1f)
-                        .padding(vertical = 8.dp)) {
-                        Text("Export")
-                    }
-                }
-                HorizontalDivider()
-            }
-            item {
-                PreferenceButton("Licenses") {
-                    if (navController.currentDestination?.route != "licenses")
-                        navController.navigate("licenses")
-                }
-                PreferenceButton("About") {
-                    if (navController.currentDestination?.route != "about")
-                        navController.navigate("about")
-                }
-            }
-        }
     }
 
-@Composable
+    var showGroupDialog by remember { mutableStateOf(false) }
-fun RegionalScreen() {
+    var showRegionalDialog by remember { mutableStateOf(false) }
-    val context = LocalContext.current
+    var showLoad by remember { mutableStateOf(false) }
+    val scope = rememberCoroutineScope()
 
-    val keyRegional = stringResource(R.string.key_regional)
+    if (showGroupDialog) {
-    val offString = stringResource(R.string.off)
+        EditPlaceColorDialog(
-    val onString = stringResource(R.string.on)
+            deleteMode = true,
-    val prefs = PreferenceManager.getDefaultSharedPreferences(context)
+            onDismiss = {
-    var selected by remember {  mutableStateOf(prefs.getString(keyRegional, offString)!!)}
+                val g = Data.selected_group
-    var regional by remember{ mutableStateOf(prefs.getString(keyRegional, offString)!!)}
+                if (g != null) {
-    var showDialog by remember{mutableStateOf(false)}
+                    Data.visits.reassignAllVisitedToGroup(g.key)
-    var showLoad by remember{mutableStateOf(false)}
+                    Data.groups.keepOnly(g.key)
+                    Data.saveData()
+                    groups = offString
+                    prefs.edit { putString(keyGroup, offString) }
+                }
+                showGroupDialog = false
+            })
+    }
 
-    if(showDialog)
+    if (showRegionalDialog) {
         Dialog(
             content = {
                 Column(
@@ -312,26 +204,27 @@ fun RegionalScreen() {
                             MaterialTheme.colors.background,
                             RoundedCornerShape(corner = CornerSize(16.dp))
                         )
-                        .padding(16.dp),){
+                        .padding(16.dp),
-                Text(style=MaterialTheme.typography.caption, text=  stringResource(R.string.delete_regions))
+                ) {
+                    Text(
+                        style = MaterialTheme.typography.caption,
+                        text = stringResource(R.string.delete_regions)
+                    )
                     Button(onClick = {
                         GeoLocImporter.clearStates()
-                        regional= selected
+                        regional = offString
-                        prefs.edit {
+                        prefs.edit { putString(keyRegional, offString) }
-                            putString(
+                        showRegionalDialog = false
-                                keyRegional,
+                    }) {
-                                regional
+                        Text(stringResource(R.string.ok))
-                            )
-                        }
-                        showDialog=false
-                    }){
-                       Text(stringResource(R.string.ok))
                     }
                 }
             },
-            onDismissRequest = { showDialog=false }
+            onDismissRequest = { showRegionalDialog = false }
         )
-    if(showLoad){
+    }
+
+    if (showLoad) {
         Dialog(
             content = {
                 CircularProgressIndicator(
@@ -343,41 +236,185 @@ fun RegionalScreen() {
             onDismissRequest = {}
         )
     }
-    val scope = rememberCoroutineScope()
+
-    MultiPreference(arrayOf(stringResource(R.string.on),stringResource(R.string.off)),regional) { key ->
+    LazyColumn(
-                when (key) {
+        modifier = Modifier
-                    offString -> { showDialog=true
+            .fillMaxSize()
-                        selected=key
+            .padding(16.dp)
+            .background(MaterialTheme.colors.background)
+    ) {
+        item {
+            Text(
+                stringResource(R.string.key_theme),
+                style = MaterialTheme.typography.h6,
+                color = MaterialTheme.colors.onBackground,
+            )
+            MultiPreference(
+                arrayOf(
+                    stringResource(R.string.system),
+                    stringResource(R.string.light),
+                    stringResource(R.string.dark)
+                ), theme
+            ) { newTheme ->
+                theme = newTheme
+                prefs.edit { putString(keyTheme, newTheme) }
+            }
+            HorizontalDivider()
+        }
+        item {
+            Text(
+                stringResource(R.string.key_projection),
+                style = MaterialTheme.typography.h6,
+                color = MaterialTheme.colors.onBackground,
+                modifier = Modifier.padding(top = 16.dp)
+            )
+            MultiPreference(
+                arrayOf(
+                    stringResource(R.string.mercator),
+                    stringResource(R.string.azimuthalequidistant),
+                    stringResource(R.string.loximuthal),
+                ),
+                projection
+            ) { newProj ->
+                projection = newProj
+                prefs.edit { putString(keyProjection, newProj) }
+                Settings.refreshProjection()
+            }
+            HorizontalDivider()
+        }
+        item {
+            SettingSwitch(
+                label = stringResource(R.string.key_group),
+                subtitle = stringResource(R.string.key_group_desc),
+                isChecked = groups == onString,
+                onCheckedChange = { isChecked ->
+                    if (!isChecked) {
+                        Data.selected_group = null
+                        showGroupDialog = true
+                    } else {
+                        groups = onString
+                        prefs.edit { putString(keyGroup, onString) }
                     }
-                    onString -> {
+                }
-                        regional = key
+            )
-                        prefs.edit { putString(keyRegional, key) }
+            HorizontalDivider()
-                        showLoad=true
+        }
+        item {
+            SettingSwitch(
+                label = stringResource(R.string.key_regional),
+                subtitle = stringResource(R.string.key_regional_desc),
+                isChecked = regional == onString,
+                onCheckedChange = { isChecked ->
+                    if (isChecked) {
+                        regional = onString
+                        prefs.edit { putString(keyRegional, onString) }
+                        showLoad = true
                         scope.launch {
                             withContext(Dispatchers.IO) {
                                 GeoLocImporter.importStates(context, true)
                             }
                             showLoad = false
                         }
+                    } else {
+                        showRegionalDialog = true
                     }
                 }
+            )
+            HorizontalDivider()
+        }
+        item {
+            SettingSwitch(
+                label = stringResource(R.string.pref_cascade_stats),
+                subtitle = stringResource(R.string.pref_cascade_stats_desc),
+                isChecked = cascadeStats == onString,
+                onCheckedChange = { isChecked ->
+                    cascadeStats = if (isChecked) onString else offString
+                    prefs.edit { putString(keyCascadeStats, cascadeStats) }
+                }
+            )
+            HorizontalDivider()
+        }
+        item {
+            Text(
+                stringResource(R.string.pref_touch_radius),
+                style = MaterialTheme.typography.h6,
+                color = MaterialTheme.colors.onBackground,
+                modifier = Modifier.padding(top = 16.dp)
+            )
+            Text(
+                stringResource(R.string.pref_touch_radius_desc),
+                style = MaterialTheme.typography.body2,
+                color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+            )
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Slider(
+                    value = touchRadius.toFloat(),
+                    onValueChange = { touchRadius = it.roundToInt() },
+                    onValueChangeFinished = { prefs.edit { putInt(keyTouchRadius, touchRadius) } },
+                    valueRange = 0f..MAX_TOUCH_RADIUS.toFloat(),
+                    steps = MAX_TOUCH_RADIUS - 1,
+                    modifier = Modifier.weight(1f)
+                )
+                Text(
+                    stringResource(R.string.pref_touch_radius_value, touchRadius),
+                    style = MaterialTheme.typography.body1,
+                    color = MaterialTheme.colors.onBackground,
+                    modifier = Modifier.padding(start = 12.dp)
+                )
             }
+            HorizontalDivider()
+        }
+        item {
+            val launcher = rememberLauncherForActivityResult(
+                contract = ActivityResultContracts.OpenDocument(),
+                onResult = { uri -> Data.doImport(context, uri) }
+            )
+            Row(
+                modifier = Modifier.fillMaxWidth().padding(vertical = 8.dp)
+            ) {
+                Button(
+                    onClick = {
+                        launcher.launch(arrayOf("*/*"))
+                    }, modifier = Modifier
+                        .weight(1f)
+                ) {
+                    Text(stringResource(R.string.action_import))
+                }
+                Spacer(modifier = Modifier.size(16.dp))
+                Button(
+                    onClick = {
+                        Data.doExport(context)
+                    }, modifier = Modifier
+                        .weight(1f)
+                ) {
+                    Text(stringResource(R.string.action_export))
+                }
+            }
+            HorizontalDivider()
+        }
+        item {
+            PreferenceButton(stringResource(R.string.about)) {
+                if (navController.currentDestination?.route != "about")
+                    navController.navigate("about")
+            }
+        }
+    }
 }
 
-
 @Composable
 fun MultiPreference(list: Array<String>, selected: String, onSelected: (String) -> Unit) {
-    Column(Modifier.padding(2.dp)) {
+    Column(Modifier.padding(vertical = 2.dp)) {
         list.forEach { value ->
             Row(
                 verticalAlignment = Alignment.CenterVertically,
                 modifier = Modifier
                     .fillMaxWidth()
-                    .height(36.dp)
+                    .height(42.dp)
                     .clickable { onSelected(value) }) {
                 RadioButton(selected = selected == value, onClick = { onSelected(value) })
                 Text(
-                    value, modifier = Modifier.padding(start = 8.dp),
+                    value, modifier = Modifier.padding(start = 12.dp),
+                    style = MaterialTheme.typography.body1,
                     color = MaterialTheme.colors.onBackground,
                 )
             }
@@ -393,3 +430,38 @@ fun PreferenceButton(text: String, onClick: () -> Unit) {
         Text(text)
     }
 }
+
+@Composable
+fun SettingSwitch(
+    label: String,
+    subtitle: String? = null,
+    isChecked: Boolean,
+    onCheckedChange: (Boolean) -> Unit
+) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable { onCheckedChange(!isChecked) }
+            .padding(vertical = 12.dp),
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        Column(modifier = Modifier.weight(1f)) {
+            Text(
+                text=label,
+                style = MaterialTheme.typography.h6,
+                color = MaterialTheme.colors.onBackground,
+            )
+            if (subtitle != null) {
+                Text(
+                    text = subtitle,
+                    style = MaterialTheme.typography.body2,
+                    color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+                )
+            }
+        }
+        androidx.compose.material.Switch(
+            checked = isChecked,
+            onCheckedChange = onCheckedChange
+        )
+    }
+}

app/src/main/java/net/helcel/beans/activity/StatsActivity.kt

@@ -20,6 +20,7 @@ import androidx.compose.material.TopAppBar
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
@@ -32,12 +33,15 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import net.helcel.beans.R
+import net.helcel.beans.countries.Country
+import net.helcel.beans.countries.GeoLoc
 import net.helcel.beans.countries.GeoLoc.LocType
 import net.helcel.beans.countries.World
 import net.helcel.beans.helper.AUTO_GROUP
 import net.helcel.beans.helper.Data
 import net.helcel.beans.helper.Groups
-import net.helcel.beans.helper.Settings.isRegional
+import net.helcel.beans.helper.NO_GROUP
+import net.helcel.beans.helper.Settings
 import net.helcel.beans.helper.Theme.getContrastColor
 
 private val MODE_LIST = listOf(LocType.WORLD, LocType.COUNTRY, LocType.STATE)
@@ -46,7 +50,7 @@ private val MODE_LIST = listOf(LocType.WORLD, LocType.COUNTRY, LocType.STATE)
 fun StatsScreen(
     onExit: ()-> Unit
 ) {
-    val modes = if (isRegional(LocalContext.current)) MODE_LIST else MODE_LIST.take(2)
+    val modes = if (Settings.isRegional(LocalContext.current)) MODE_LIST else MODE_LIST.take(2)
     var selectedTab by remember { mutableIntStateOf(0) }
     var countMode by remember { mutableStateOf(true) }
 
@@ -57,7 +61,7 @@ fun StatsScreen(
                 TopAppBar(
                     title = {
                         Row(verticalAlignment = Alignment.CenterVertically){
-                            Text(text=stringResource(R.string.action_edit), modifier = Modifier.weight(1f))
+                            Text(text=stringResource(R.string.action_stat), modifier = Modifier.weight(1f))
                             Button(onClick = { countMode = !countMode }) {
                                 Text(if (countMode) "Count" else "Area")
                             }
@@ -115,26 +119,83 @@ fun StatsList(activeMode: LocType, countMode: Boolean) {
 
 @Composable
 fun StatsRow(group: Groups.Group, activeMode: LocType, countMode: Boolean) {
+    val context = LocalContext.current
+    val isCascadeStats = remember { Settings.isCascadeStats(context) }
+    val visits by Data.visits.visitsFlow.collectAsState()
 
-    val visited = remember(group, activeMode) {
+    val continents = remember { World.WWW.children.toList() }
-        Data.visits.getVisitedByValue(group.key)
+    val countries = remember {
+        World.WWW.children.flatMap {
+            if (it is Country) listOf(it) else it.children
+        }
     }
 
-    val count = when (activeMode) {
+    val visitedItems = remember(group, activeMode, isCascadeStats, visits) {
-        LocType.WORLD -> World.WWW.children.filter { it.code in visited }.size
+        val list = when (activeMode) {
-        LocType.COUNTRY -> World.WWW.children.flatMap { it.children.filter { c -> c.code in visited } }.size
+            LocType.WORLD -> continents
-        LocType.STATE -> World.WWW.children.flatMap { a->a.children.flatMap { b->b.children.filter { c->c.code in visited } } }.size
+            LocType.COUNTRY -> countries
-        else -> 0
+            LocType.STATE -> countries.flatMap { it.children }
+            else -> emptyList()
+        }
+
+        fun getExplicitColor(l: GeoLoc): Int? {
+            val c = visits.getOrDefault(l.code, 0)
+            return if (c != NO_GROUP && c != AUTO_GROUP) c else null
+        }
+
+        fun getEffectiveGroup(l: GeoLoc): Int {
+            getExplicitColor(l)?.let { return it }
+
+            if (isCascadeStats) {
+                // Parent -> Child (closest explicit ancestor)
+                val country = countries.find { it.children.contains(l) }
+                val countryColor = country?.let { getExplicitColor(it) }
+                if (countryColor != null) return countryColor
+
+                val continent = continents.find {
+                    it.children.contains(l) || (country != null && it.children.contains(country))
+                }
+                val continentColor = continent?.let { getExplicitColor(it) }
+                if (continentColor != null) return continentColor
+
+                val worldColor = getExplicitColor(World.WWW)
+                if (worldColor != null) return worldColor
+
+                // Child -> Parent (most common explicit descendant)
+                val descendants = mutableListOf<GeoLoc>()
+                fun collect(curr: GeoLoc) {
+                    curr.children.forEach {
+                        descendants.add(it)
+                        collect(it)
+                    }
+                }
+                collect(l)
+                val descendantColors = descendants.mapNotNull { getExplicitColor(it) }
+                if (descendantColors.isNotEmpty()) {
+                    return descendantColors.groupBy { it }.maxByOrNull { it.value.size }?.key ?: AUTO_GROUP
+                }
+            } else {
+                if (l.type == LocType.WORLD || l.type == LocType.COUNTRY) {
+                    val descendants = mutableListOf<GeoLoc>()
+                    fun collect(curr: GeoLoc) {
+                        curr.children.forEach { descendants.add(it); collect(it) }
+                    }
+                    collect(l)
+                    val dc = descendants.mapNotNull { getExplicitColor(it) }
+                    if (dc.isNotEmpty()) return dc.groupBy { it }.maxByOrNull { it.value.size }?.key ?: AUTO_GROUP
+                }
+            }
+
+            return AUTO_GROUP
+        }
+
+        list.filter { getEffectiveGroup(it) == group.key }
     }
 
-    val area = when (activeMode) {
+    val count = visitedItems.size
-        LocType.WORLD -> World.WWW.children.filter { it.code in visited }.sumOf { it.area }
+    val area = visitedItems.sumOf { it.area.toLong() }
-        LocType.COUNTRY -> World.WWW.children.flatMap { it.children.filter { c -> c.code in visited } }.sumOf { it.area }
-        LocType.STATE -> World.WWW.children.flatMap { a->a.children.flatMap { b->b.children.filter { c->c.code in visited } } }.sumOf { it.area }
-        else -> 0
-    }
 
-    val displayValue = if (countMode) count.toString() else stringResource(R.string.number_with_unit, area, "km²")
+    val displayValue = if (countMode) count.toString() else stringResource(R.string.number_with_unit, area.toInt(), "km²")
 
     val backgroundColor = group.color.color
     val textColor = getContrastColor(backgroundColor)

app/src/main/java/net/helcel/beans/activity/sub/EditPlaceScreen.kt

@@ -1,6 +1,7 @@
 package net.helcel.beans.activity.sub
 
 
+import android.content.Context
 import androidx.activity.compose.BackHandler
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
@@ -54,6 +55,44 @@ fun EditPlaceScreenPreview(){
     EditPlaceScreen(Group.EEE)
 }
 
+/**
+ * Applies a place straight away where a single group makes the choice obvious,
+ * as tapping the checkbox does. Returns false when the group still has to be
+ * picked from the colour dialog.
+ */
+fun applyDirectVisit(ctx: Context, loc: GeoLoc): Boolean {
+    Data.selected_geoloc = loc
+    Data.selected_group = null
+    if (Data.groups.size() != 1 || !Settings.isSingleGroup(ctx)) return false
+    val current = Data.visits.getVisited(loc)
+    Data.visits.setVisited(
+        loc,
+        if (current == NO_GROUP || current == AUTO_GROUP) Data.groups.getUniqueEntry()!!.key
+        else if (loc.children.any { Data.visits.getVisited(it) != NO_GROUP }) AUTO_GROUP
+        else NO_GROUP,
+    )
+    syncVisited()
+    Data.saveData()
+    Data.selected_geoloc = null
+    return true
+}
+
+/** Stores whatever the colour dialog came back with. */
+fun commitVisitDialog(cleared: Boolean) {
+    if (cleared) {
+        Data.visits.setVisited(Data.selected_geoloc, NO_GROUP)
+        syncVisited()
+        Data.saveData()
+    }
+    if (Data.selected_group != null && Data.selected_geoloc != null) {
+        Data.visits.setVisited(Data.selected_geoloc, Data.selected_group!!.key)
+        syncVisited()
+        Data.saveData()
+    }
+    Data.selected_geoloc = null
+    Data.selected_group = null
+}
+
 fun syncVisited(loc: GeoLoc?=World.WWW): Boolean {
     var changed = false
     loc?.children?.forEach { tt ->
@@ -122,22 +161,7 @@ fun EditPlaceScreen(loc: GeoLoc, onExit:()->Unit={}) {
     if(showEdit)
         EditPlaceDialog(false) {
             showEdit = false
-            if (it) {
+            commitVisitDialog(it)
-                Data.visits.setVisited(Data.selected_geoloc, NO_GROUP)
-                syncVisited()
-                Data.saveData()
-
-                if (Data.selected_geoloc!=null && Data.selected_geoloc!!.children.any { itc-> Data.visits.getVisited(itc) != NO_GROUP }) {
-                    Data.clearing_geoloc = Data.selected_geoloc
-                }
-            }
-            if (Data.selected_group != null && Data.selected_geoloc != null) {
-                Data.visits.setVisited(Data.selected_geoloc, Data.selected_group!!.key)
-                syncVisited()
-                Data.saveData()
-            }
-            Data.selected_geoloc = null
-            Data.selected_group = null
         }
 
     Column {
@@ -167,22 +191,7 @@ fun EditPlaceScreen(loc: GeoLoc, onExit:()->Unit={}) {
                             tabs.add(loc)
                         }
                     }, {
-                        Data.selected_geoloc = loc
+                        if (!applyDirectVisit(ctx, loc)) showEdit = true
-                        if (Data.groups.size() == 1 && Settings.isSingleGroup(ctx)) {
-                            Data.visits.setVisited(Data.selected_geoloc,
-                                if (it != ToggleableState.On) Data.groups.getUniqueEntry()!!.key
-                                else if(Data.selected_geoloc?.children?.any{ itc->
-                                        Data.visits.getVisited(itc)!= NO_GROUP } == true) AUTO_GROUP
-                                else NO_GROUP
-                            )
-                            Data.saveData()
-                            Data.selected_group = null
-                        } else {
-                            Data.selected_group = null
-                            showEdit=true
-                        }
-                        syncVisited()
-                        Data.saveData()
                     })
 
             }
@@ -196,7 +205,7 @@ fun EditPlaceScreen(loc: GeoLoc, onExit:()->Unit={}) {
 fun GeoLocRow(
     loc: GeoLoc,
     onClick: () -> Unit,
-    onCheckedChange: (ToggleableState) -> Unit
+    onToggle: () -> Unit,
 ) {
     val visits by Data.visits.visitsFlow.collectAsState()
     val checked by remember(visits, loc) {
@@ -235,7 +244,7 @@ fun GeoLocRow(
 
         TriStateCheckbox(
             state = checked,
-            onClick= { onCheckedChange(checked) },
+            onClick = onToggle,
             colors = CheckboxDefaults.colors(
                 checkedColor = color,
             ),

app/src/main/java/net/helcel/beans/activity/sub/LicenseScreen.kt

@@ -1,45 +0,0 @@
-package net.helcel.beans.activity.sub
-
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.material.MaterialTheme
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.tooling.preview.Preview
-import com.mikepenz.aboutlibraries.ui.compose.DefaultChipColors
-import com.mikepenz.aboutlibraries.ui.compose.DefaultLibraryColors
-import com.mikepenz.aboutlibraries.ui.compose.android.produceLibraries
-import com.mikepenz.aboutlibraries.ui.compose.m3.LibrariesContainer
-import net.helcel.beans.R
-import net.helcel.beans.activity.SysTheme
-
-
-@Preview
-@Composable
-fun LicenseScreen() {
-    val libraries = produceLibraries(R.raw.aboutlibraries)
-    SysTheme {
-        LibrariesContainer(
-            libraries = libraries.value,
-            modifier = Modifier.fillMaxSize(),
-            colors = DefaultLibraryColors(
-                libraryBackgroundColor = MaterialTheme.colors.background,
-                libraryContentColor = MaterialTheme.colors.onBackground,
-                licenseChipColors = DefaultChipColors(
-                    containerColor = MaterialTheme.colors.primary,
-                    contentColor = MaterialTheme.colors.onPrimary,
-                ),
-                versionChipColors = DefaultChipColors(
-                    containerColor = MaterialTheme.colors.secondary,
-                    contentColor = MaterialTheme.colors.onSecondary,
-                ),
-                fundingChipColors = DefaultChipColors(
-                    containerColor = MaterialTheme.colors.secondary,
-                    contentColor = MaterialTheme.colors.onSecondary,
-                ),
-                dialogConfirmButtonColor = MaterialTheme.colors.primary,
-                dialogBackgroundColor = MaterialTheme.colors.onPrimary,
-                dialogContentColor = MaterialTheme.colors.primary,
-            )
-        )
-    }
-}

app/src/main/java/net/helcel/beans/activity/sub/MapPickDialog.kt

@@ -0,0 +1,157 @@
+package net.helcel.beans.activity.sub
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.CornerSize
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.MaterialTheme
+import androidx.compose.material.Text
+import androidx.compose.material.TextButton
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import net.helcel.beans.R
+import net.helcel.beans.activity.SysTheme
+import net.helcel.beans.countries.GeoLoc
+import net.helcel.beans.countries.GeoLocTree
+import net.helcel.beans.helper.AUTO_GROUP
+import net.helcel.beans.helper.Data
+import net.helcel.beans.helper.NO_GROUP
+
+private class PickRow(val loc: GeoLoc, val depth: Int)
+
+/**
+ * Turns the shapes a tap landed near into an indented list.
+ *
+ * Each candidate brings its continent and country along, so a tap that is
+ * ambiguous between two regions can still be answered with "the whole country"
+ * or "the whole continent" instead of only the regions themselves.
+ */
+private fun rowsFor(candidates: List<GeoLoc>): List<PickRow> {
+    val rows = LinkedHashMap<String, PickRow>()
+    candidates.forEach { candidate ->
+        GeoLocTree.chain(candidate).forEachIndexed { depth, loc ->
+            rows.getOrPut(loc.code) { PickRow(loc, depth) }
+        }
+    }
+    return rows.values.toList()
+}
+
+@Composable
+fun MapPickDialog(
+    candidates: List<GeoLoc>,
+    onPick: (GeoLoc) -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val visits by Data.visits.visitsFlow.collectAsState()
+    val rows = remember(candidates) { rowsFor(candidates) }
+
+    SysTheme {
+        Dialog(
+            onDismissRequest = onDismiss,
+            content = {
+                Column(
+                    modifier = Modifier
+                        .background(
+                            MaterialTheme.colors.background,
+                            RoundedCornerShape(corner = CornerSize(16.dp)),
+                        )
+                        .padding(16.dp),
+                ) {
+                    Text(
+                        style = MaterialTheme.typography.h6,
+                        color = MaterialTheme.colors.onBackground,
+                        text = stringResource(R.string.select_place),
+                    )
+                    Text(
+                        style = MaterialTheme.typography.caption,
+                        color = MaterialTheme.colors.onBackground,
+                        text = stringResource(R.string.select_place_sub),
+                    )
+                    Spacer(modifier = Modifier.height(16.dp))
+                    Box(
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .heightIn(max = 360.dp),
+                    ) {
+                        LazyColumn(modifier = Modifier.fillMaxWidth()) {
+                            items(rows, key = { it.loc.code }) { row ->
+                                val group = visits.getOrElse(row.loc.code) { NO_GROUP }
+                                Row(
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .clickable { onPick(row.loc) }
+                                        .background(
+                                            Color(88, 88, 88, 88),
+                                            RoundedCornerShape(corner = CornerSize(16.dp)),
+                                        )
+                                        .padding(
+                                            start = 8.dp + 16.dp * row.depth,
+                                            top = 8.dp,
+                                            end = 8.dp,
+                                            bottom = 8.dp,
+                                        ),
+                                    verticalAlignment = Alignment.CenterVertically,
+                                ) {
+                                    Box(
+                                        modifier = Modifier
+                                            .size(16.dp)
+                                            .background(
+                                                if (group == NO_GROUP || group == AUTO_GROUP) {
+                                                    MaterialTheme.colors.onBackground
+                                                } else {
+                                                    Color(
+                                                        Data.groups.getGroupFromKey(group).color.color
+                                                    )
+                                                },
+                                                CircleShape,
+                                            ),
+                                    )
+                                    Spacer(modifier = Modifier.width(8.dp))
+                                    Text(
+                                        color = MaterialTheme.colors.onBackground,
+                                        style = MaterialTheme.typography.body2,
+                                        text = row.loc.fullName,
+                                        // Long names wrap inside the row rather
+                                        // than running off the end of it.
+                                        modifier = Modifier.weight(1f),
+                                    )
+                                }
+                                Spacer(modifier = Modifier.height(8.dp))
+                            }
+                        }
+                    }
+                    Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.End,
+                    ) {
+                        TextButton(onClick = onDismiss) {
+                            Text(stringResource(R.string.cancel))
+                        }
+                    }
+                }
+            },
+        )
+    }
+}

app/src/main/java/net/helcel/beans/countries/GeoLocImporter.kt

@@ -12,6 +12,7 @@ object GeoLocImporter {
 
     fun importStates(ctx: Context, force: Boolean = false) {
         if (!Settings.isRegional(ctx) and !force) {
+            GeoLocTree.rebuild()
             return
         }
         val fs = BufferedReader(InputStreamReader(ctx.assets.open("geoloc_state.txt")))
@@ -26,6 +27,7 @@ object GeoLocImporter {
                 }
             }
         }
+        GeoLocTree.rebuild()
     }
 
     fun clearStates() {
@@ -39,6 +41,7 @@ object GeoLocImporter {
             }
             country.children.clear()
         }
+        GeoLocTree.rebuild()
         Data.saveData()
     }
 }

app/src/main/java/net/helcel/beans/countries/GeoLocTree.kt

@@ -0,0 +1,50 @@
+package net.helcel.beans.countries
+
+/**
+ * Code to place lookup, plus the chain of parents above a place.
+ *
+ * Regions only exist once [GeoLocImporter] has read them, so this is rebuilt
+ * whenever that set changes rather than derived once and cached forever.
+ */
+object GeoLocTree {
+
+    private var index: Map<String, GeoLoc> = emptyMap()
+    private var parents: Map<String, GeoLoc> = emptyMap()
+
+    fun rebuild() {
+        val byCode = HashMap<String, GeoLoc>()
+        val parent = HashMap<String, GeoLoc>()
+        byCode[World.WWW.code] = World.WWW
+        World.WWW.children.forEach { child ->
+            byCode[child.code] = child
+            parent[child.code] = World.WWW
+            child.children.forEach { country ->
+                byCode[country.code] = country
+                parent[country.code] = child
+                country.children.forEach { state ->
+                    byCode[state.code] = state
+                    parent[state.code] = country
+                }
+            }
+        }
+        index = byCode
+        parents = parent
+    }
+
+    fun find(code: String): GeoLoc? {
+        if (index.isEmpty()) rebuild()
+        return index[code]
+    }
+
+    /** [loc] and everything above it, world first, so it reads as a path. */
+    fun chain(loc: GeoLoc): List<GeoLoc> {
+        if (index.isEmpty()) rebuild()
+        val path = ArrayList<GeoLoc>(4)
+        var current: GeoLoc? = loc
+        while (current != null && current != World.WWW) {
+            path.add(current)
+            current = parents[current.code]
+        }
+        return path.reversed()
+    }
+}

app/src/main/java/net/helcel/beans/helper/Data.kt

@@ -8,7 +8,6 @@ import android.os.Build
 import android.os.Environment
 import android.provider.MediaStore
 import androidx.core.content.ContextCompat
-import androidx.preference.PreferenceManager
 import net.helcel.beans.R
 import net.helcel.beans.countries.GeoLoc
 import java.util.HashMap
@@ -23,7 +22,6 @@ object Data {
 
     var selected_group : Groups.Group? = null
     var selected_geoloc: GeoLoc? = null
-    var clearing_geoloc: GeoLoc? = null
 
     private val groupsSerial = Groups.GroupsSerializer()
     private val visitsSerial = Visits.VisitsSerializer()
@@ -31,7 +29,7 @@ object Data {
     private lateinit var sharedPreferences: SharedPreferences
 
     fun loadData(ctx: Context, id:Int) {
-        sharedPreferences = PreferenceManager.getDefaultSharedPreferences(ctx)
+        sharedPreferences = defaultPreferences(ctx)
 
         val groupsString = sharedPreferences.getString("groups_$id",null)
         val visitsString = sharedPreferences.getString("visits_$id",null)

app/src/main/java/net/helcel/beans/helper/Groups.kt

@@ -43,6 +43,13 @@ class Groups(val id: Int, @SerialName("grps") private val groups: HashMap<Int, G
         updateFlow()
     }
 
+    fun keepOnly(key: Int) {
+        val keep = groups[key] ?: return
+        groups.clear()
+        groups[key] = keep
+        updateFlow()
+    }
+
     private fun updateFlow() {
         _groupsFlow.value = groups.values.toList()
     }

app/src/main/java/net/helcel/beans/helper/Prefs.kt

@@ -0,0 +1,12 @@
+package net.helcel.beans.helper
+
+import android.content.Context
+import android.content.SharedPreferences
+
+/**
+ * The preference file opened directly, under the name and mode androidx's
+ * PreferenceManager used. Settings written by earlier versions still load, and
+ * the app no longer pulls in the preference UI framework for one call.
+ */
+fun defaultPreferences(ctx: Context): SharedPreferences =
+    ctx.getSharedPreferences(ctx.packageName + "_preferences", Context.MODE_PRIVATE)

app/src/main/java/net/helcel/beans/helper/Settings.kt

@@ -2,17 +2,26 @@ package net.helcel.beans.helper
 
 import android.content.Context
 import android.content.SharedPreferences
-import androidx.preference.PreferenceManager
 import net.helcel.beans.R
 import net.helcel.beans.activity.MainScreen
 
+/**
+ * Default distance, in dp, around a tap that still counts as hitting a place.
+ * Kept small because the radius is measured on screen: zoomed out to the whole
+ * world, even a few dp reach across several countries.
+ */
+const val DEFAULT_TOUCH_RADIUS = 4
+
+/** Largest tap radius the setting offers. */
+const val MAX_TOUCH_RADIUS = 48
+
 object Settings {
 
     private lateinit var sp: SharedPreferences
     private lateinit var mainActivity: MainScreen
     fun start(ctx: MainScreen) {
         mainActivity = ctx
-        sp = PreferenceManager.getDefaultSharedPreferences(ctx)
+        sp = defaultPreferences(ctx)
     }
 
     fun isSingleGroup(ctx: Context): Boolean {
@@ -29,6 +38,21 @@ object Settings {
         )
     }
 
+    /**
+     * How far around a tap, in dp, the map looks for other places. Anything
+     * within it is offered as a candidate instead of painting straight away.
+     */
+    fun getTouchRadius(ctx: Context): Float {
+        return sp.getInt(ctx.getString(R.string.key_touch_radius), DEFAULT_TOUCH_RADIUS).toFloat()
+    }
+
+    fun isCascadeStats(ctx: Context): Boolean {
+        return getBooleanValue(
+            ctx,
+            sp.getString(ctx.getString(R.string.key_cascade_stats), ctx.getString(R.string.off))
+        )
+    }
+
     fun getStatPref(ctx: Context): String? {
         return sp.getString(
             ctx.getString(R.string.key_stats),

app/src/main/java/net/helcel/beans/map/MapAssets.kt

@@ -0,0 +1,23 @@
+package net.helcel.beans.map
+
+import android.content.Context
+import net.helcel.beans.R
+import net.helcel.beans.helper.defaultPreferences
+
+/** Picks the map asset matching the projection the user chose. */
+object MapAssets {
+
+    fun assetFor(ctx: Context): String {
+        val preferences = defaultPreferences(ctx)
+        return when (
+            preferences.getString(
+                ctx.getString(R.string.key_projection),
+                ctx.getString(R.string.mercator),
+            )
+        ) {
+            ctx.getString(R.string.azimuthalequidistant) -> "aeqd01.bmap"
+            ctx.getString(R.string.loximuthal) -> "loxim01.bmap"
+            else -> "webmercator01.bmap"
+        }
+    }
+}

app/src/main/java/net/helcel/beans/map/MapReader.kt

@@ -0,0 +1,133 @@
+package net.helcel.beans.map
+
+import android.graphics.Path
+import android.graphics.RectF
+import java.io.InputStream
+
+private const val VERSION = 2
+
+/**
+ * Reads the packed map assets produced by `packmap.js`.
+ *
+ * The maps used to ship as SVG, which spends around four megabytes per
+ * projection spelling coordinates out in decimal ASCII inside XML. The packed
+ * form says the same thing in a fraction of that, and reading it is a straight
+ * scan over a byte array instead of an XML parse with a float scanner on top.
+ *
+ * The format is documented in `packmap.js`; the two have to agree.
+ */
+object MapReader {
+
+    fun read(input: InputStream): MapWorld {
+        val reader = ByteReader(input.readBytes())
+        reader.readHeader()
+        val width = reader.unsigned() * reader.scale
+        val height = reader.unsigned() * reader.scale
+        val count = reader.unsigned()
+        val shapes = ArrayList<MapShape>(count)
+        repeat(count) { shapes.add(reader.shape()) }
+        return MapWorld(width, height, shapes)
+    }
+}
+
+private class ByteReader(private val data: ByteArray) {
+
+    private var pos = 0
+
+    /** One grid step in user units, read from the header. */
+    var scale = 1f
+        private set
+
+    fun readHeader() {
+        require(
+            data.size > 5 &&
+                data[0] == 'B'.code.toByte() && data[1] == 'M'.code.toByte() &&
+                data[2] == 'A'.code.toByte() && data[3] == 'P'.code.toByte()
+        ) { "not a packed map" }
+        require(data[4].toInt() == VERSION) { "unsupported packed map version ${data[4]}" }
+        pos = 5
+        scale = 1f / unsigned()
+    }
+
+    fun unsigned(): Int {
+        var result = 0
+        var shift = 0
+        while (true) {
+            val byte = data[pos++].toInt()
+            result = result or ((byte and 0x7F) shl shift)
+            if (byte and 0x80 == 0) return result
+            shift += 7
+        }
+    }
+
+    /** Zigzag, because deltas run both ways and are almost always tiny. */
+    fun signed(): Int {
+        val value = unsigned()
+        return if (value and 1 == 1) -((value ushr 1) + 1) else value ushr 1
+    }
+
+    fun flag(): Boolean = data[pos++].toInt() != 0
+
+    fun text(): String {
+        val length = unsigned()
+        val value = String(data, pos, length, Charsets.UTF_8)
+        pos += length
+        return value
+    }
+
+    fun shape(): MapShape {
+        val code = text()
+        val isState = flag()
+        val ringCount = unsigned()
+
+        val rings = ArrayList<FloatArray>(ringCount)
+        var nonZero: Path? = null
+        var evenOdd: Path? = null
+        var minX = Float.MAX_VALUE
+        var minY = Float.MAX_VALUE
+        var maxX = -Float.MAX_VALUE
+        var maxY = -Float.MAX_VALUE
+
+        repeat(ringCount) {
+            val points = unsigned()
+            val useEvenOdd = flag()
+            val ring = FloatArray(points * 2)
+            // Each point is a delta from the one before it, the first from the
+            // origin, so the whole ring decodes in one pass.
+            var x = 0
+            var y = 0
+            for (i in 0 until points) {
+                x += signed()
+                y += signed()
+                val fx = x * scale
+                val fy = y * scale
+                ring[i * 2] = fx
+                ring[i * 2 + 1] = fy
+                if (fx < minX) minX = fx
+                if (fx > maxX) maxX = fx
+                if (fy < minY) minY = fy
+                if (fy > maxY) maxY = fy
+            }
+            rings.add(ring)
+
+            val path = if (useEvenOdd) {
+                evenOdd ?: Path().also { it.fillType = Path.FillType.EVEN_ODD; evenOdd = it }
+            } else {
+                nonZero ?: Path().also { nonZero = it }
+            }
+            path.moveTo(ring[0], ring[1])
+            var i = 2
+            while (i < ring.size) {
+                path.lineTo(ring[i], ring[i + 1])
+                i += 2
+            }
+            path.close()
+        }
+
+        return MapShape(
+            code, isState, rings,
+            RectF(minX, minY, maxX, maxY),
+            nonZero, evenOdd,
+        )
+    }
+}

app/src/main/java/net/helcel/beans/map/MapRenderer.kt

@@ -0,0 +1,103 @@
+package net.helcel.beans.map
+
+import android.graphics.Canvas
+import android.graphics.Matrix
+import android.graphics.Paint
+import android.graphics.Path
+import android.graphics.PorterDuff
+import android.graphics.RectF
+import kotlin.math.min
+import kotlin.math.roundToInt
+
+/** Draws a [MapWorld] onto a canvas through a pan/zoom transform. */
+class MapRenderer(private val map: MapWorld) {
+
+    private val fill = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+        style = Paint.Style.FILL
+    }
+    private val stroke = Paint(Paint.ANTI_ALIAS_FLAG).apply {
+        style = Paint.Style.STROKE
+        strokeCap = Paint.Cap.ROUND
+        strokeJoin = Paint.Join.ROUND
+    }
+    private val inverse = Matrix()
+    private val values = FloatArray(9)
+    private val visible = RectF()
+
+    /** False when the border is too faint to be worth a draw call at all. */
+    private var strokeVisible = true
+
+    /**
+     * Paints the map into [canvas], mapping user units through [transform].
+     * Shapes outside the canvas are skipped, which is what makes drawing cheap
+     * once the map is zoomed in.
+     */
+    fun draw(canvas: Canvas, transform: Matrix, style: MapStyle) {
+        // SRC rather than blended: the bitmap is reused between renders.
+        canvas.drawColor(style.background, PorterDuff.Mode.SRC)
+        if (!transform.invert(inverse)) return
+        visible.set(0f, 0f, canvas.width.toFloat(), canvas.height.toFloat())
+        inverse.mapRect(visible)
+
+        // Widths are given in device pixels, so undo the zoom the canvas is
+        // about to apply to them, then let them grow slowly with it.
+        transform.getValues(values)
+        val scale = values[Matrix.MSCALE_X]
+        val perPixel = 1f / scale
+        val fitted = min(canvas.width / map.width, canvas.height / map.height)
+        val zoom = (scale / fitted).coerceAtLeast(1f)
+        val regionPx = strokeWidthAt(zoom, REGION_STROKE_STOPS)
+        val countryPx = strokeWidthAt(zoom, COUNTRY_STROKE_STOPS)
+
+        canvas.save()
+        canvas.concat(transform)
+        setStroke(style.background, if (style.regional) regionPx else countryPx, perPixel)
+        for ((code, color) in style.fills) {
+            val shape = map.byCode[code] ?: continue
+            if (!RectF.intersects(shape.bounds, visible)) continue
+            fill.color = color
+            drawShape(canvas, shape.nonZero, true)
+            drawShape(canvas, shape.evenOdd, true)
+        }
+
+        // With regions on, the country outlines come back on top as the thicker
+        // borders between them.
+        if (style.regional) {
+            setStroke(style.background, countryPx, perPixel)
+            for (shape in map.countries) {
+                if (!RectF.intersects(shape.bounds, visible)) continue
+                drawShape(canvas, shape.nonZero, false)
+                drawShape(canvas, shape.evenOdd, false)
+            }
+        }
+        canvas.restore()
+    }
+
+    /**
+     * Sets a border width given in device pixels.
+     *
+     * Anything thinner than a pixel cannot be drawn as such: the rasteriser
+     * turns it into a one pixel hairline at full strength, which is why every
+     * border below that width used to come out the same weight no matter how
+     * far out the map was. Below a pixel the width is carried as opacity
+     * instead, so a quarter-pixel border reads as a quarter as dark.
+     */
+    private fun setStroke(color: Int, devicePx: Float, perPixel: Float) {
+        strokeVisible = devicePx > 0.004f
+        if (!strokeVisible) return
+        stroke.color = color
+        if (devicePx < 1f) {
+            stroke.strokeWidth = perPixel
+            stroke.alpha = (devicePx * 255f).roundToInt().coerceIn(0, 255)
+        } else {
+            stroke.strokeWidth = perPixel * devicePx
+            stroke.alpha = 255
+        }
+    }
+
+    private fun drawShape(canvas: Canvas, path: Path?, filled: Boolean) {
+        if (path == null) return
+        if (filled) canvas.drawPath(path, fill)
+        if (strokeVisible) canvas.drawPath(path, stroke)
+    }
+}

app/src/main/java/net/helcel/beans/map/MapStyle.kt

@@ -0,0 +1,115 @@
+package net.helcel.beans.map
+
+import android.content.Context
+import net.helcel.beans.countries.GeoLoc
+import net.helcel.beans.countries.World
+import net.helcel.beans.helper.AUTO_GROUP
+import net.helcel.beans.helper.Data
+import net.helcel.beans.helper.NO_GROUP
+import net.helcel.beans.helper.Settings
+import kotlin.math.ln
+
+/**
+ * Border width in device pixels at each zoom, interpolated in between.
+ *
+ * Zoom counts how far in the map is from its fitted size, so 1 is the whole
+ * world on screen and 64 is as far in as it goes. The stops step by fours and
+ * are interpolated on a log axis, so the weight changes evenly as you pinch
+ * rather than in a rush at one end.
+ *
+ * Region borders start at nothing on purpose: a sub-national border says very
+ * little with the whole world in view, and drawing three and a half thousand of
+ * them only muddies the land.
+ *
+ *   zoom     1x     4x    16x    64x
+ *   region  0.0    0.5    1.0    2.0
+ *   country 1.0    1.5    3.0    6.0
+ */
+val STROKE_ZOOM_STOPS = floatArrayOf(1f, 4f, 16f, 64f)
+
+val REGION_STROKE_STOPS = floatArrayOf(0f, 0.5f, 1f, 2f)
+
+val COUNTRY_STROKE_STOPS = floatArrayOf(1f, 1.5f, 3f, 6f)
+
+/** The width for [zoom], straight-line between the stops on a log axis. */
+fun strokeWidthAt(zoom: Float, widths: FloatArray): Float {
+    if (zoom <= STROKE_ZOOM_STOPS.first()) return widths.first()
+    for (i in 1 until STROKE_ZOOM_STOPS.size) {
+        if (zoom <= STROKE_ZOOM_STOPS[i]) {
+            val low = STROKE_ZOOM_STOPS[i - 1]
+            val t = ln(zoom / low) / ln(STROKE_ZOOM_STOPS[i] / low)
+            return widths[i - 1] + t * (widths[i] - widths[i - 1])
+        }
+    }
+    return widths.last()
+}
+
+/**
+ * The colour every shape is drawn with, resolved once per render.
+ *
+ * This replaces the stylesheet the map used to be rendered through. A place
+ * inherits the colour of its parent, so painting a whole continent still shows
+ * up on each country inside it, and [fills] ends up holding exactly the shapes
+ * that get drawn — which is also exactly what a tap may land on.
+ */
+class MapStyle(
+    val regional: Boolean,
+    val land: Int,
+    val background: Int,
+    val fills: Map<String, Int>,
+) {
+
+    companion object {
+
+        fun build(ctx: Context, land: Int, background: Int): MapStyle {
+            val regional = Settings.isRegional(ctx)
+            val fills = HashMap<String, Int>()
+            World.WWW.children.forEach { child ->
+                if (child.type == GeoLoc.LocType.COUNTRY) {
+                    // A country hanging straight off the world, such as Antarctica.
+                    addCountry(fills, child, colorOf(World.WWW, regional), regional, land)
+                } else {
+                    val continent = colorOf(child, regional) ?: colorOf(World.WWW, regional)
+                    child.children.forEach { addCountry(fills, it, continent, regional, land) }
+                }
+            }
+            return MapStyle(regional, land, background, fills)
+        }
+
+        private fun addCountry(
+            fills: HashMap<String, Int>,
+            country: GeoLoc,
+            inherited: Int?,
+            regional: Boolean,
+            land: Int,
+        ) {
+            val color = colorOf(country, regional) ?: inherited
+            // Regions are only drawn for countries that actually have some; the
+            // rest keep their outline filled so the map stays complete.
+            if (regional && country.children.isNotEmpty()) {
+                country.children.forEach { state ->
+                    fills[state.code] = colorOf(state, regional) ?: color ?: land
+                }
+            } else {
+                fills[country.code] = color ?: land
+            }
+        }
+
+        /** The group colour assigned to [loc], or `null` when it has none of its own. */
+        private fun colorOf(loc: GeoLoc, regional: Boolean): Int? {
+            val key = Data.visits.getVisited(loc)
+            val group = Data.groups.getGroupFromKey(key)
+            if (group.key != NO_GROUP) return group.color.color
+            // A place marked automatically stands in for its children. That only
+            // needs a colour of its own where the children are not drawn, and
+            // never on a continent, which would swallow the whole map.
+            val isParent = loc.type == GeoLoc.LocType.GROUP ||
+                    loc.type == GeoLoc.LocType.CUSTOM_GROUP ||
+                    loc.type == GeoLoc.LocType.WORLD
+            if (key == AUTO_GROUP && !regional && !isParent) {
+                return Data.groups.getGroupFromPos(0).second.color.color
+            }
+            return null
+        }
+    }
+}

app/src/main/java/net/helcel/beans/map/MapView.kt

@@ -0,0 +1,345 @@
+package net.helcel.beans.map
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Matrix
+import android.graphics.Paint
+import android.os.Handler
+import android.os.HandlerThread
+import android.os.SystemClock
+import android.view.GestureDetector
+import android.view.MotionEvent
+import android.view.ScaleGestureDetector
+import android.view.View
+import android.widget.OverScroller
+import androidx.core.graphics.createBitmap
+import kotlin.math.min
+
+/** A shape a tap landed on or near, with how far away it was in user units. */
+class MapPick(val code: String, val distance: Float)
+
+/** How far past the fitted map a pinch may zoom in. */
+private const val MAX_ZOOM = 64f
+
+/** How much a double tap zooms in by. */
+private const val DOUBLE_TAP_ZOOM = 3f
+
+/** Time a gesture has to settle before the map is redrawn sharp again. */
+private const val RENDER_DELAY_MS = 80L
+
+/** How long the map may stay stretched while a gesture keeps going. */
+private const val MAX_STALE_MS = 500L
+
+/**
+ * Most candidates a single tap will offer. A wide radius over a crowded part of
+ * the map can reach dozens of places, which is more of a list than anyone wants
+ * to read; the nearest few are what the tap was plausibly aiming at.
+ */
+private const val MAX_CANDIDATES = 16
+
+/**
+ * The map itself: pan, pinch and tap over a [MapWorld].
+ *
+ * Drawing every country as vectors costs far too much to do on each frame, so a
+ * render lands in an off-screen bitmap on a worker thread and gestures just move
+ * that bitmap around. Once the gesture settles the map is drawn again at the new
+ * zoom, which is what keeps it sharp all the way in.
+ */
+@SuppressLint("ViewConstructor")
+class MapView(context: Context) : View(context) {
+
+    var world: MapWorld? = null
+        set(value) {
+            if (field === value) return
+            field = value
+            renderer = value?.let(::MapRenderer)
+            fitToView()
+            requestRender(0L)
+        }
+
+    @Volatile
+    var style: MapStyle? = null
+        set(value) {
+            if (field === value) return
+            field = value
+            requestRender(0L)
+        }
+
+    /** How far from a tap, in dp, other shapes still count as candidates. */
+    var touchRadiusDp: Float = 4f
+
+    /** Called on a tap with every nearby shape, nearest first. */
+    var onPick: ((List<MapPick>) -> Unit)? = null
+
+    @Volatile
+    private var renderer: MapRenderer? = null
+
+    private val scroller = OverScroller(context)
+
+    private val transform = Matrix()
+    private val inverse = Matrix()
+    private val values = FloatArray(9)
+    private val point = FloatArray(2)
+    private var minScale = 1f
+    private var maxScale = 1f
+
+    private val blitPaint = Paint(Paint.FILTER_BITMAP_FLAG)
+    private val blit = Matrix()
+
+    private val lock = Any()
+    private var front: Bitmap? = null
+    private var back: Bitmap? = null
+    private val frontMatrix = Matrix()
+    private val frontValues = FloatArray(9)
+    private val pendingMatrix = Matrix()
+    private var pendingWidth = 0
+    private var pendingHeight = 0
+    @Volatile private var lastRenderAt = 0L
+
+    private val renderThread = HandlerThread("map-render").apply { start() }
+    private val renderHandler = Handler(renderThread.looper)
+    private val renderTask = Runnable { render() }
+
+    private val scaleDetector = ScaleGestureDetector(
+        context,
+        object : ScaleGestureDetector.SimpleOnScaleGestureListener() {
+            override fun onScale(detector: ScaleGestureDetector): Boolean {
+                val scale = currentScale()
+                val target = (scale * detector.scaleFactor).coerceIn(minScale, maxScale)
+                transform.postScale(target / scale, target / scale, detector.focusX, detector.focusY)
+                clamp()
+                invalidate()
+                return true
+            }
+        },
+    )
+
+    private val gestureDetector = GestureDetector(
+        context,
+        object : GestureDetector.SimpleOnGestureListener() {
+            override fun onDown(e: MotionEvent): Boolean {
+                scroller.forceFinished(true)
+                return true
+            }
+
+            override fun onFling(
+                e1: MotionEvent?,
+                e2: MotionEvent,
+                velocityX: Float,
+                velocityY: Float,
+            ): Boolean {
+                val map = world ?: return false
+                transform.getValues(values)
+                val scale = values[Matrix.MSCALE_X]
+                val x = values[Matrix.MTRANS_X].toInt()
+                val y = values[Matrix.MTRANS_Y].toInt()
+                val w = map.width * scale
+                val h = map.height * scale
+                scroller.forceFinished(true)
+                scroller.fling(
+                    x, y, velocityX.toInt(), velocityY.toInt(),
+                    if (w > width) (width - w).toInt() else x, if (w > width) 0 else x,
+                    if (h > height) (height - h).toInt() else y, if (h > height) 0 else y,
+                )
+                postInvalidateOnAnimation()
+                return true
+            }
+
+            override fun onScroll(
+                e1: MotionEvent?,
+                e2: MotionEvent,
+                distanceX: Float,
+                distanceY: Float,
+            ): Boolean {
+                transform.postTranslate(-distanceX, -distanceY)
+                clamp()
+                invalidate()
+                return true
+            }
+
+            override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
+                pick(e.x, e.y)
+                return true
+            }
+
+            override fun onDoubleTap(e: MotionEvent): Boolean {
+                val scale = currentScale()
+                val target = if (scale >= maxScale * 0.99f) {
+                    minScale
+                } else {
+                    min(scale * DOUBLE_TAP_ZOOM, maxScale)
+                }
+                transform.postScale(target / scale, target / scale, e.x, e.y)
+                clamp()
+                invalidate()
+                return true
+            }
+        },
+    )
+
+    @SuppressLint("ClickableViewAccessibility")
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        scaleDetector.onTouchEvent(event)
+        gestureDetector.onTouchEvent(event)
+        return true
+    }
+
+    override fun computeScroll() {
+        if (!scroller.computeScrollOffset()) return
+        transform.getValues(values)
+        values[Matrix.MTRANS_X] = scroller.currX.toFloat()
+        values[Matrix.MTRANS_Y] = scroller.currY.toFloat()
+        transform.setValues(values)
+        postInvalidateOnAnimation()
+    }
+
+    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
+        super.onSizeChanged(w, h, oldw, oldh)
+        fitToView()
+        requestRender(0L)
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        val current = style
+        canvas.drawColor(current?.background ?: 0)
+
+        var stale = true
+        synchronized(lock) {
+            val bitmap = front
+            if (bitmap != null && !bitmap.isRecycled && frontMatrix.invert(blit)) {
+                blit.postConcat(transform)
+                canvas.drawBitmap(bitmap, blit, blitPaint)
+                transform.getValues(values)
+                stale = !values.contentEquals(frontValues)
+            }
+        }
+        // Scheduling only ever happens from here or from a setter, both on the
+        // main thread, so a render never starts while its bitmap is on screen.
+        if (stale) {
+            val overdue = SystemClock.uptimeMillis() - lastRenderAt > MAX_STALE_MS
+            requestRender(if (overdue) 0L else RENDER_DELAY_MS)
+        }
+    }
+
+    override fun onDetachedFromWindow() {
+        super.onDetachedFromWindow()
+        scroller.forceFinished(true)
+        renderHandler.removeCallbacks(renderTask)
+        renderThread.quitSafely()
+        // Dropped rather than recycled: a render may still be part way through
+        // one of them, and the collector is happy to take them from here.
+        synchronized(lock) {
+            front = null
+            back = null
+        }
+    }
+
+    /** Centres the map in the view and works out how far it may be zoomed. */
+    private fun fitToView() {
+        val map = world ?: return
+        if (width == 0 || height == 0 || map.width <= 0f || map.height <= 0f) return
+        val scale = min(width / map.width, height / map.height)
+        minScale = scale
+        maxScale = scale * MAX_ZOOM
+        transform.setScale(scale, scale)
+        transform.postTranslate(
+            (width - map.width * scale) / 2f,
+            (height - map.height * scale) / 2f,
+        )
+    }
+
+    private fun currentScale(): Float {
+        transform.getValues(values)
+        return values[Matrix.MSCALE_X]
+    }
+
+    /** Keeps the map from being dragged away from the viewport. */
+    private fun clamp() {
+        val map = world ?: return
+        transform.getValues(values)
+        val scale = values[Matrix.MSCALE_X]
+        val w = map.width * scale
+        val h = map.height * scale
+        values[Matrix.MTRANS_X] = if (w <= width) {
+            (width - w) / 2f
+        } else {
+            values[Matrix.MTRANS_X].coerceIn(width - w, 0f)
+        }
+        values[Matrix.MTRANS_Y] = if (h <= height) {
+            (height - h) / 2f
+        } else {
+            values[Matrix.MTRANS_Y].coerceIn(height - h, 0f)
+        }
+        transform.setValues(values)
+    }
+
+    private fun requestRender(delay: Long) {
+        if (width == 0 || height == 0 || renderer == null || style == null) return
+        synchronized(lock) {
+            pendingMatrix.set(transform)
+            pendingWidth = width
+            pendingHeight = height
+        }
+        renderHandler.removeCallbacks(renderTask)
+        renderHandler.postDelayed(renderTask, delay)
+    }
+
+    private fun render() {
+        val matrix = Matrix()
+        val w: Int
+        val h: Int
+        synchronized(lock) {
+            matrix.set(pendingMatrix)
+            w = pendingWidth
+            h = pendingHeight
+        }
+        if (w <= 0 || h <= 0) return
+        val current = renderer ?: return
+        val currentStyle = style ?: return
+
+        var target = back
+        if (target == null || target.width != w || target.height != h) {
+            target?.recycle()
+            target = createBitmap(w, h)
+            back = target
+        }
+        current.draw(Canvas(target), matrix, currentStyle)
+
+        synchronized(lock) {
+            back = front
+            front = target
+            frontMatrix.set(matrix)
+            matrix.getValues(frontValues)
+        }
+        lastRenderAt = SystemClock.uptimeMillis()
+        postInvalidate()
+    }
+
+    /** Reports every shape within the tap radius of ([x], [y]), nearest first. */
+    private fun pick(x: Float, y: Float) {
+        val map = world ?: return
+        val current = style ?: return
+        val callback = onPick ?: return
+        if (!transform.invert(inverse)) return
+
+        point[0] = x
+        point[1] = y
+        inverse.mapPoints(point)
+        val radius = touchRadiusDp * resources.displayMetrics.density / currentScale()
+
+        val picks = ArrayList<MapPick>()
+        for (code in current.fills.keys) {
+            val shape = map.byCode[code] ?: continue
+            val bounds = shape.bounds
+            if (point[0] < bounds.left - radius || point[0] > bounds.right + radius) continue
+            if (point[1] < bounds.top - radius || point[1] > bounds.bottom + radius) continue
+            val distance = shape.distanceTo(point[0], point[1])
+            if (distance <= radius) picks.add(MapPick(code, distance))
+        }
+        if (picks.isEmpty()) return
+        picks.sortBy { it.distance }
+        callback(if (picks.size > MAX_CANDIDATES) picks.subList(0, MAX_CANDIDATES) else picks)
+    }
+}

app/src/main/java/net/helcel/beans/map/MapWorld.kt

@@ -0,0 +1,86 @@
+package net.helcel.beans.map
+
+import android.graphics.Path
+import android.graphics.RectF
+import kotlin.math.sqrt
+
+/**
+ * One named piece of map geometry: a country outline or a single region.
+ *
+ * The geometry is kept twice on purpose. [nonZero] and [evenOdd] are what the
+ * renderer hands to the canvas, while [rings] keeps the raw points because
+ * hit testing needs the distance to an edge, which a [Path] cannot give us.
+ */
+class MapShape(
+    val code: String,
+    val isState: Boolean,
+    val rings: List<FloatArray>,
+    val bounds: RectF,
+    val nonZero: Path?,
+    val evenOdd: Path?,
+) {
+
+    /** True when ([x], [y]) falls inside the shape. Holes and lakes count as outside. */
+    fun contains(x: Float, y: Float): Boolean {
+        if (x < bounds.left || x > bounds.right || y < bounds.top || y > bounds.bottom) return false
+        // Even-odd crossing count over every ring at once: rings never overlap, so
+        // an island still reads as inside and a hole still reads as outside.
+        var inside = false
+        for (ring in rings) {
+            var j = ring.size - 2
+            var i = 0
+            while (i < ring.size) {
+                val yi = ring[i + 1]
+                val yj = ring[j + 1]
+                if ((yi > y) != (yj > y)) {
+                    val xi = ring[i]
+                    val xj = ring[j]
+                    if (x < xi + (y - yi) * (xj - xi) / (yj - yi)) inside = !inside
+                }
+                j = i
+                i += 2
+            }
+        }
+        return inside
+    }
+
+    /** Distance from ([x], [y]) to the shape, `0` when the point is inside it. */
+    fun distanceTo(x: Float, y: Float): Float {
+        if (contains(x, y)) return 0f
+        var best = Float.MAX_VALUE
+        for (ring in rings) {
+            var j = ring.size - 2
+            var i = 0
+            while (i < ring.size) {
+                val d = segmentDistanceSq(x, y, ring[j], ring[j + 1], ring[i], ring[i + 1])
+                if (d < best) best = d
+                j = i
+                i += 2
+            }
+        }
+        return if (best == Float.MAX_VALUE) Float.MAX_VALUE else sqrt(best)
+    }
+
+    private fun segmentDistanceSq(
+        px: Float, py: Float,
+        ax: Float, ay: Float,
+        bx: Float, by: Float,
+    ): Float {
+        val dx = bx - ax
+        val dy = by - ay
+        val len = dx * dx + dy * dy
+        val t = if (len <= 0f) 0f else (((px - ax) * dx + (py - ay) * dy) / len).coerceIn(0f, 1f)
+        val cx = px - (ax + t * dx)
+        val cy = py - (ay + t * dy)
+        return cx * cx + cy * cy
+    }
+}
+
+/** The whole map, in SVG user units, as a flat set of named shapes. */
+class MapWorld(val width: Float, val height: Float, val shapes: List<MapShape>) {
+
+    val byCode: Map<String, MapShape> = shapes.associateBy { it.code }
+
+    /** Country outlines, keyed by ISO code. Drawn as borders when regions are on. */
+    val countries: List<MapShape> = shapes.filter { !it.isState }
+}

app/src/main/java/net/helcel/beans/svg/CSSWrapper.kt

@@ -1,75 +0,0 @@
-package net.helcel.beans.svg
-
-import android.content.Context
-import androidx.compose.material.MaterialTheme
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.graphics.toArgb
-import androidx.core.graphics.drawable.toDrawable
-import net.helcel.beans.countries.World
-import net.helcel.beans.helper.AUTO_GROUP
-import net.helcel.beans.helper.Data.groups
-import net.helcel.beans.helper.Data.visits
-import net.helcel.beans.helper.NO_GROUP
-import net.helcel.beans.helper.Settings
-import net.helcel.beans.helper.Theme.colorToHex6
-
-
-class CSSWrapper(private val ctx: Context) {
-
-    private val continents: String = World.WWW.children.joinToString(",") { "#${it.code}2" }
-    private val countries: String = World.WWW.children.joinToString(",") { itt ->
-        itt.children.joinToString(",") { "#${it.code}2" }
-    }
-    private val regional: String = World.WWW.children.joinToString(",") { itt ->
-        itt.children.joinToString(",") { "#${it.code}1" }
-    }
-
-    @Composable
-    fun getBaseColors() : Pair<String, String> {
-        val colorForeground = colorToHex6(MaterialTheme.colors.onBackground.toArgb().toDrawable())
-        val colorBackground = colorToHex6(MaterialTheme.colors.background.toArgb().toDrawable())
-
-        return Pair(colorForeground, colorBackground)
-    }
-
-    private var customCSS: String = ""
-
-    init {
-        refresh()
-    }
-
-
-    private fun refresh() {
-        val id = if (Settings.isRegional(ctx)) "1" else "2"
-        customCSS = visits.getVisitedByValue().map { (k, v) ->
-            (if (groups.getGroupFromKey(k).key != NO_GROUP) {
-                v
-            } else if (!Settings.isRegional(ctx) && k == AUTO_GROUP) {
-                v.filter { it !in World.WWW.children.map { it1 -> it1.code } }
-            } else {
-                emptyList()
-            }).takeIf { it.isNotEmpty() }
-                ?.joinToString(",") { "#${it}$id,#${it}" } + "{fill:${
-                if (k == AUTO_GROUP) colorToHex6(groups.getGroupFromPos(0).second.color) 
-                else colorToHex6(groups.getGroupFromKey(k).color)
-            };}"
-        }.joinToString("")
-    }
-    @Composable
-    fun get(): String {
-        val (colorForeground,colorBackground) = getBaseColors()
-        refresh()
-        return if (Settings.isRegional(ctx)) {
-            val countryRegionalCSS: String =
-                "svg{fill:$colorForeground;stroke:$colorBackground;stroke-width:0.01;}" +
-                        "$continents,$countries{fill:none;stroke:$colorBackground;stroke-width:0.1;}"
-            countryRegionalCSS + customCSS
-        } else {
-            val countryOnlyCSS: String =
-                "svg{fill:$colorForeground;stroke:$colorBackground;stroke-width:0.1;}" +
-                        "${regional}{display:none;}"
-            countryOnlyCSS + customCSS
-        }
-    }
-
-}

app/src/main/java/net/helcel/beans/svg/SVGWrapper.kt

@@ -1,28 +0,0 @@
-package net.helcel.beans.svg
-
-import android.content.Context
-import android.content.SharedPreferences
-import androidx.preference.PreferenceManager
-import com.caverock.androidsvg.SVG
-import net.helcel.beans.R
-
-class SVGWrapper(ctx: Context) {
-
-    private val sharedPreferences: SharedPreferences =
-        PreferenceManager.getDefaultSharedPreferences(ctx)
-    private val svgFile = when (sharedPreferences.getString(
-        ctx.getString(R.string.key_projection),
-        ctx.getString(R.string.mercator)
-    )) {
-        ctx.getString(R.string.azimuthalequidistant) -> "aeqd01.svg"
-        ctx.getString(R.string.loximuthal) -> "loxim01.svg"
-        ctx.getString(R.string.mercator) -> "webmercator01.svg"
-        else -> "webmercator01.svg"
-    }
-
-    private var svg: SVG? = SVG.getFromAsset(ctx.assets, svgFile)
-
-    fun get(): SVG? {
-        return svg
-    }
-}

app/src/main/res/drawable/ic_launcher_monochrome.xml

@@ -7,21 +7,6 @@
         android:scaleY="0.8918919"
         android:translateX="6.918919"
         android:translateY="6.918919">
-
-        <group
-            android:scaleX="1.5"
-            android:scaleY="1.5"
-            android:translateX="10"
-            android:translateY="10">
-            <path
-                android:pathData="M36,36m-28,0a28,28 0,1 1,56 0a28,28 0,1 1,-56 0"
-                android:strokeLineJoin="round"
-                android:strokeWidth="2"
-                android:fillColor="@color/blue"
-                android:strokeColor="#000000"
-                android:strokeLineCap="round"/>
-
-        </group>
         <group
             android:scaleX="1.25"
             android:scaleY="1.25"

app/src/main/res/mipmap-anydpi/ic_launcher_round.xml

@@ -2,5 +2,5 @@
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background android:drawable="@drawable/ic_launcher_background"/>
     <foreground android:drawable="@drawable/ic_launcher_foreground"/>
-    <monochrome android:drawable="@drawable/ic_launcher_foreground"/>
+    <monochrome android:drawable="@drawable/ic_launcher_monochrome"/>
 </adaptive-icon>

app/src/main/res/values-night/themes.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="Theme.Beans" parent="Theme.MaterialComponents.DayNight.NoActionBar">
+    <style name="Theme.Beans" parent="android:Theme.Material.NoActionBar">
         <!-- Status bar color in dark mode -->
         <item name="android:statusBarColor">@color/blue</item>
         <!-- Window background in dark mode -->
@@ -8,8 +8,5 @@
         <item name="android:windowLightStatusBar">false</item>
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
 
-        <item name="colorPrimary">@color/blue</item>
-        <item name="colorPrimaryDark">@color/blue</item>
-        <item name="colorAccent">@color/blue</item>
     </style>
 </resources>

app/src/main/res/values/en.xml

@@ -13,20 +13,37 @@
     <string name="key_stats">Statistics</string>
     <string name="counters">Prefer counters (#)</string>
     <string name="percentages">Prefer percentages (%)</string>
-    <string name="licenses">Licenses</string>
     <string name="key_group">Groups</string>
-    <string name="key_regional">Regional</string>
+    <string name="key_regional">Regional mode</string>
+    <string name="key_regional_desc">Enable tracking of states and provinces</string>
+    <string name="key_cascade_stats">key_cascade_stats</string>
+    <string name="pref_cascade_stats">Cascade statistics</string>
+    <string name="pref_cascade_stats_desc">Include parents and children in the counts</string>
+    <string name="key_group_desc">Enable multiple colors</string>
+    <string name="key_touch_radius">key_touch_radius</string>
+    <string name="pref_touch_radius">Tap radius</string>
+    <string name="pref_touch_radius_desc">How far around a tap on the map other places should be considered</string>
+    <string name="pref_touch_radius_value">%1$d dp</string>
     <string name="about">About</string>
+    <string name="pref_category_appearance">Appearance</string>
+    <string name="pref_category_features">Features</string>
+    <string name="pref_category_data">Data</string>
+    <string name="action_import">Import</string>
+    <string name="action_export">Export</string>
+    <string name="import_desc">Load data from a previously exported file.</string>
+    <string name="export_desc">Save your current data to a file for backup or transfer.</string>
+    <string name="key_projection_desc">Select how the map is projected onto a 2D surface.</string>
     <string name="beans_is_foss">Beans is free and open source software, licensed under the GNU General Public License (version 3 or later)</string>
     <string name="beans_repo_uri">https://github.com/helcel-net/beans</string>
     <string name="beans_repo">Project repository: %1$s\n Feel free to report issues or contribute.</string>
-    <string name="foss_licenses">Free and open source dependencies and licenses</string>
     <string name="about_beans">About the Beans application</string>
     <string name="edit_group">Select the group to assign.</string>
     <string name="edit_group_sub">Long press on a group to edit its name and color.</string>
     <string name="select_group">Select the group to keep.</string>
     <string name="select_group_sub">All others will be deleted and its mappings reassigned to the group you choose here.</string>
     <string name="delete_group">Are your sure you want to delete this group and remove all its country mappings?</string>
+    <string name="select_place">Select a place</string>
+    <string name="select_place_sub">Tap the place to color, or a larger one that contains it.</string>
     <string name="delete_regions">Are you sure you want to disable regions and reassign all regional mappings to the corresponding countries?</string>
 
     <string name="name">Name</string>

app/src/main/res/values/themes.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="Theme.Beans" parent="Theme.MaterialComponents.DayNight.NoActionBar">
+    <style name="Theme.Beans" parent="android:Theme.Material.Light.NoActionBar">
         <!-- Status bar color -->
         <item name="android:statusBarColor">@color/blue</item>
         <!-- Window background - shows through statusBarsPadding() area -->
@@ -8,9 +8,5 @@
         <item name="android:windowLightStatusBar">false</item>
         <item name="android:windowDrawsSystemBarBackgrounds">true</item>
 
-        <!-- Optional: Primary colors for the theme -->
-        <item name="colorPrimary">@color/blue</item>
-        <item name="colorPrimaryDark">@color/blue</item>
-        <item name="colorAccent">@color/blue</item>
     </style>
 </resources>

build.gradle

@@ -1,6 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id 'com.android.application' version '9.2.1' apply false
+    id 'com.android.application' version '9.4.0' apply false
-    id 'com.android.library' version '9.2.1' apply false
+    id 'com.android.library' version '9.3.2' apply false
-    id 'org.jetbrains.kotlin.android' version '2.4.0' apply false
+    id 'org.jetbrains.kotlin.android' version '2.4.10' apply false
 }

genenum.js

@@ -1,10 +1,8 @@
 #!/bin/node
 
-import {readFileSync,writeFileSync,existsSync} from 'fs'
+import {readFileSync,existsSync} from 'fs'
 import area from '@turf/area'
 import * as turf from '@turf/turf'
-import * as path from 'path';
-import { JSDOM } from 'jsdom';
 
 
 const countries =
@@ -162,52 +160,4 @@ async function run(){
   }
 }
 
-
-function fixSvg(svgPath) {
-  const countryToRegion = {};
-  for (const [region, countries] of Object.entries(groups)) {
-    countries.forEach(country => countryToRegion[country] = region);
-  }
-  const absoluteInputPath = path.resolve(svgPath);
-  if (!existsSync(absoluteInputPath)) {
-    throw new Error(`Input file not found at: ${absoluteInputPath}`);
-  }
-  const svgContent = readFileSync(absoluteInputPath, 'utf8');
-  const dom = new JSDOM(svgContent, { contentType: 'image/svg+xml' });
-  const document = dom.window.document;
-  const svgRoot = document.querySelector('svg');
-    if (!svgRoot) {
-      throw new Error("Invalid or empty SVG structure encountered.");
-    }
-    if (svgRoot.getAttribute('data-processed') === 'true') {
-      console.log(`Skipping: File at "${svgPath}" has already been processed.`);
-      return;
-    }
-
-  const elementGroups = Array.from(svgRoot.querySelectorAll('g'));
- elementGroups.forEach(group => {
-    const currentId = group.getAttribute('id') || '';
-    const baseIsoCode = currentId.replace(/\d+$/, '');
-    const regionKey = countryToRegion[baseIsoCode] || 'XXXX';
-    let regionGroup = svgRoot.querySelector(`g[id="${regionKey}"]`);
-    if (!regionGroup) {
-      regionGroup = document.createElementNS('http://w3.org', 'g');
-      regionGroup.setAttribute('id', regionKey);
-      svgRoot.appendChild(regionGroup);
-    }
-    regionGroup.appendChild(group);
-  });
-  svgRoot.setAttribute('data-processed', 'true');
-  const absoluteOutputPath = path.resolve(svgPath);
-  let cleanXmlString = svgRoot.outerHTML;
-  cleanXmlString = cleanXmlString.replace(/[\r\n]+/g, '');
-  cleanXmlString = cleanXmlString.replace(/xmlns="http:\/\/w3\.org"\s?/g, '');
-  cleanXmlString = cleanXmlString.replace(/xmlns="http:\/\/www\.w3\.org\/2000\/svg"\s?/g, '');
-  cleanXmlString = cleanXmlString.replace('<svg', '<svg xmlns="http://www.w3.org/2000/svg"');
-  writeFileSync(absoluteOutputPath, cleanXmlString, 'utf8');
-}
-
 run()
-fixSvg("./app/src/main/assets/loxim01.svg")
-fixSvg("./app/src/main/assets/webmercator01.svg")
-fixSvg("./app/src/main/assets/aeqd01.svg")

genmap.sh

@@ -1,7 +1,5 @@
 #!/bin/bash
 
-LOCAL_SVG_PATH="app/src/main/assets/"
-
 GADM_VERSION="4.1"
 GADM_BASEPATH="https://geodata.ucdavis.edu/gadm"
 
@@ -80,43 +78,7 @@ download_1() {
 }
 
 
-toSVG_0() {
+generate_map() {
-    local input_files=("ATA")
-
-    for country in "${countries[@]}"
-    do
-        input_file="./temp/0/${country}.json"
-        if [ -f "$input_file" ]; then
-            input_files+=("$input_file")
-        else
-            echo "Input file $input_file not found."
-        fi
-    done
-
-
-    "$mapshaper" -i combine-files ${input_files[@]} -proj webmercator -simplify 0.005 weighted keep-shapes resolution=1200x1200 -o ./app/src/main/assets/mercator0.svg svg-data=GID_0,COUNTRY id-field=GID_0
-    "$mapshaper" -i combine-files ${input_files[@]} -proj aeqd +lat_0=90 -simplify 0.005 weighted keep-shapes resolution=1200x1200 -o ./app/src/main/assets/aeqd0.svg svg-data=GID_0,COUNTRY id-field=GID_0
-}
-
-toSVG_1() {
-    input_files=("ATA")
-
-    for country in "${countries[@]}"
-    do
-        input_file="./temp/1/${country}.json"
-        # input_file="./temp/1/gadm41_${country}_1.json"
-        if [ -f "$input_file" ]; then
-            input_files+=("$input_file")
-        else
-            echo "Input file $input_file not found."
-        fi
-    done
-
-    "$mapshaper" -i combine-files ${input_files[@]} -proj webmercator -simplify 0.005 weighted keep-shapes resolution=1200x1200  -o ./app/src/main/assets/mercator1.svg svg-data=GID_0,COUNTRY,GID,NAME id-field=GID
-    "$mapshaper" -i combine-files ${input_files[@]} -proj aeqd +lat_0=90 -simplify 0.005 weighted keep-shapes resolution=1200x1200 -o ./app/src/main/assets/aeqd1.svg svg-data=GID_0,COUNTRY,GID,NAME id-field=GID
-}
-
-generate_svg_map() {
     local OUT_FILE="$1"      # First argument: Output destination path
     local PROJ_ARGS="$2"     # Second argument: Projection parameters
     shift 2                  # Remove the first two arguments, leaving only the files
@@ -125,6 +87,9 @@ generate_svg_map() {
     echo "Generating: $OUT_FILE using projection [$PROJ_ARGS]"
     echo "Processing ${#FILES_TO_RUN[@]} files..."
 
+    # Each feature is tagged with the place it belongs to and whether it is a
+    # country outline or one of its regions. packmap.js groups on that; nothing
+    # downstream needs the features split into layers.
     local JS_PIPELINE_LOGIC="
         const conflicts = {
                 'Z01': 'IND', 'Z04': 'IND', 'Z05': 'IND', 'Z07': 'IND', 'Z09': 'IND',
@@ -133,32 +98,27 @@ generate_svg_map() {
         };
         let rawCode = GID_0 || 'UNK';
         let cCode = conflicts[rawCode] ? conflicts[rawCode] : rawCode;
+        // Antarctica's boundary file carries no country code at either level.
+        if (cCode === 'UNK') cCode = 'ATA';
         let isGidMissing = (!GID || GID === 'undefined' || GID === 'null' || GID === '');
-        if (isGidMissing) {
+        CODE = isGidMissing ? cCode : GID;
-            COUNTRY_GROUP = cCode+'2';
+        LEVEL = isGidMissing ? 0 : 1;
-        } else {
-            COUNTRY_GROUP = cCode+'1';
-        }
     "
 
     "$mapshaper" -i "${FILES_TO_RUN[@]}" combine-files \
         -snap \
         -merge-layers force\
         -proj $PROJ_ARGS densify \
-        -simplify 2% weighted keep-shapes \
+        -simplify 10% weighted keep-shapes \
         -filter-islands min-area=0 \
         -sort 'this.area' ascending \
         -each "$JS_PIPELINE_LOGIC" \
-        -split COUNTRY_GROUP \
         -o "$OUT_FILE" \
-        format=svg \
+        format=geojson
-        id-field=GID \
-        precision=0.1 \
-        target=*
 
 }
 
-toSVG_01() {
+build_maps() {
     input_files=()
     
     input_files+=("./temp/1/ATA.json")
@@ -178,9 +138,12 @@ toSVG_01() {
         fi
     done
 
-    generate_svg_map "./app/src/main/assets/loxim01.svg" "loxim" "${input_files[@]}"
+    generate_map "./mapdata/loxim01.geojson" "loxim" "${input_files[@]}"
-    generate_svg_map "./app/src/main/assets/webmercator01.svg" "webmercator" "${input_files[@]}"
+    generate_map "./mapdata/webmercator01.geojson" "webmercator" "${input_files[@]}"
-    generate_svg_map "./app/src/main/assets/aeqd01.svg" "aeqd +lat_0=90" "${input_files[@]}"
+    generate_map "./mapdata/aeqd01.geojson" "aeqd +lat_0=90" "${input_files[@]}"
+
+    # The app reads the packed form; the GeoJSON above is only an intermediate.
+    node packmap.js ./mapdata/loxim01.geojson ./mapdata/webmercator01.geojson ./mapdata/aeqd01.geojson
 }
 
 do_1() {
@@ -199,8 +162,6 @@ do_0() {
 }
 # do_0
 # do_1
-# toSVG_0
+build_maps
-# toSVG_1
-toSVG_01
 
 #CUW, CCK, XCL, CXR, IOT, BVT, ABW, FLK, GIB, HMD, KIR, SXM, MDV, MCO, NIU, NFK, PCN, MAF, SGS, VAT

gradle/wrapper/gradle-wrapper.properties

@@ -1,7 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionSha256Sum=bafc141b619ad6350fd975fc903156dd5c151998cc8b058e8c1044ab5f7b031f
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.7.1-bin.zip
-distributionUrl=https\://services.gradle.org/distributions/gradle-9.5.1-bin.zip
 networkTimeout=10000
 retries=0
 retryBackOffMs=500

gradlew

@@ -20,7 +20,7 @@
 
 ##############################################################################
 #
-#   Gradle start up script for POSIX generated by Gradle.
+#   gradlew start up script for POSIX generated by Gradle.
 #
 #   Important for running:
 #
@@ -29,7 +29,7 @@
 #       bash, then to run this script, type that shell name before the whole
 #       command line, like:
 #
-#           ksh Gradle
+#           ksh gradlew
 #
 #       Busybox and similar reduced shells will NOT work, because this script
 #       requires all of these POSIX shell features:

gradlew.bat

@@ -19,7 +19,7 @@
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
-@rem  Gradle startup script for Windows
+@rem  gradlew startup script for Windows
 @rem
 @rem ##########################################################################
 
@@ -72,7 +72,7 @@ echo location of your Java installation. 1>&2
 
 
 
-@rem Execute Gradle
+@rem Execute gradlew
 @rem endlocal doesn't take effect until after the line is parsed and variables are expanded
 @rem which allows us to clear the local environment before executing the java command
 endlocal & "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %* & call :exitWithErrorLevel

mapping.js

@@ -1,325 +0,0 @@
-var continents = {
-XAD:"EEE",
-ALA:"EEE",
-ALB:"EEE",
-AND:"EEE",
-AUT:"EEE",
-BLR:"EEE",
-BEL:"EEE",
-BIH:"EEE",
-BGR:"EEE",
-HRV:"EEE",
-CYP:"EEE",
-CZE:"EEE",
-DNK:"EEE",
-EST:"EEE",
-FRO:"EEE",
-FIN:"EEE",
-FRA:"EEE",
-DEU:"EEE",
-GIB:"EEE",
-GRC:"EEE",
-GGY:"EEE",
-HUN:"EEE",
-ISL:"EEE",
-IRL:"EEE",
-IMN:"EEE",
-ITA:"EEE",
-JEY:"EEE",
-KAZ:"EEE",
-XKO:"EEE",
-LVA:"EEE",
-LIE:"EEE",
-LTU:"EEE",
-LUX:"EEE",
-MLT:"EEE",
-MDA:"EEE",
-MCO:"EEE",
-MNE:"EEE",
-NLD:"EEE",
-MKD:"EEE",
-NOR:"EEE",
-POL:"EEE",
-PRT:"EEE",
-ROU:"EEE",
-RUS:"EEE",
-SMR:"EEE",
-SRB:"EEE",
-SVK:"EEE",
-SVN:"EEE",
-ESP:"EEE",
-SJM:"EEE",
-SWE:"EEE",
-CHE:"EEE",
-UKR:"EEE",
-GBR:"EEE",
-VAT:"EEE",
-
-AFG:"ABB",
-ARM:"ABB",
-AZE:"ABB",
-BHR:"ABB",
-BGD:"ABB",
-BTN:"ABB",
-IOT:"ABB",
-BRN:"ABB",
-KHM:"ABB",
-CCK:"ABB",
-CHN:"ABB",
-CXR:"ABB",
-GEO:"ABB",
-HKG:"ABB",
-IND:"ABB",
-IDN:"ABB",
-IRN:"ABB",
-IRQ:"ABB",
-ISR:"ABB",
-JPN:"ABB",
-JOR:"ABB",
-KWT:"ABB",
-KGZ:"ABB",
-LAO:"ABB",
-LBN:"ABB",
-MAC:"ABB",
-MYS:"ABB",
-MDV:"ABB",
-MNG:"ABB",
-MMR:"ABB",
-NPL:"ABB",
-PRK:"ABB",
-OMN:"ABB",
-PAK:"ABB",
-PSE:"ABB",
-PHL:"ABB",
-QAT:"ABB",
-SAU:"ABB",
-SGP:"ABB",
-KOR:"ABB",
-LKA:"ABB",
-SYR:"ABB",
-TWN:"ABB",
-TJK:"ABB",
-THA:"ABB",
-TLS:"ABB",
-TUR:"ABB",
-TKM:"ABB",
-ARE:"ABB",
-UZB:"ABB",
-VNM:"ABB",
-YEM:"ABB",
-ZNC:"ABB",
-
-DZA:"FFF",
-AGO:"FFF",
-BDI:"FFF",
-BEN:"FFF",
-BWA:"FFF",
-BFA:"FFF",
-BDI:"FFF",
-CPV:"FFF",
-CMR:"FFF",
-CAF:"FFF",
-TCD:"FFF",
-COM:"FFF",
-COG:"FFF",
-COD:"FFF",
-CIV:"FFF",
-DJI:"FFF",
-EGY:"FFF",
-GNQ:"FFF",
-ERI:"FFF",
-ETH:"FFF",
-ATF:"FFF",
-GAB:"FFF",
-GMB:"FFF",
-GHA:"FFF",
-GIN:"FFF",
-GNB:"FFF",
-KEN:"FFF",
-LSO:"FFF",
-LBR:"FFF",
-LBY:"FFF",
-MDG:"FFF",
-MWI:"FFF",
-MLI:"FFF",
-MRT:"FFF",
-MUS:"FFF",
-MYT:"FFF",
-MAR:"FFF",
-MOZ:"FFF",
-NAM:"FFF",
-NER:"FFF",
-NGA:"FFF",
-COD:"FFF",
-REU:"FFF",
-RWA:"FFF",
-STP:"FFF",
-SEN:"FFF",
-SYC:"FFF",
-SLE:"FFF",
-SOM:"FFF",
-ZAF:"FFF",
-SSD:"FFF",
-SHN:"FFF",
-SDN:"FFF",
-SWZ:"FFF",
-TZA:"FFF",
-TGO:"FFF",
-TUN:"FFF",
-UGA:"FFF",
-COD:"FFF",
-ZMB:"FFF",
-ZWE:"FFF",
-ESH:"FFF",
-
-ABW:"NNN",
-AIA:"NNN",
-ATG:"NNN",
-BHS:"NNN",
-BRB:"NNN",
-BLZ:"NNN",
-BMU:"NNN",
-BES:"NNN",
-VGB:"NNN",
-CAN:"NNN",
-CYM:"NNN",
-XCL:"NNN",
-CRI:"NNN",
-CUB:"NNN",
-CUW:"NNN",
-DMA:"NNN",
-DOM:"NNN",
-SLV:"NNN",
-GRL:"NNN",
-GRD:"NNN",
-GLP:"NNN",
-GTM:"NNN",
-HTI:"NNN",
-HND:"NNN",
-JAM:"NNN",
-MTQ:"NNN",
-MEX:"NNN",
-MSR:"NNN",
-ANT:"NNN",
-CUW:"NNN",
-NIC:"NNN",
-PAN:"NNN",
-PRI:"NNN",
-BLM:"NNN",
-KNA:"NNN",
-LCA:"NNN",
-MAF:"NNN",
-SPM:"NNN",
-VCT:"NNN",
-SXM:"NNN",
-TTO:"NNN",
-TCA:"NNN",
-USA:"NNN",
-UMI:"NNN",
-VIR:"NNN",
-
-ARG:"SRR",
-BOL:"SRR",
-BRA:"SRR",
-CHL:"SRR",
-COL:"SRR",
-ECU:"SRR",
-FLK:"SRR",
-GUF:"SRR",
-GUY:"SRR",
-PRY:"SRR",
-PER:"SRR",
-SUR:"SRR",
-URY:"SRR",
-VEN:"SRR",
-
-ASM:"UUU",
-AUS:"UUU",
-COK:"UUU",
-FJI:"UUU",
-PYF:"UUU",
-GUM:"UUU",
-KIR:"UUU",
-MHL:"UUU",
-FSM:"UUU",
-NRU:"UUU",
-NCL:"UUU",
-NZL:"UUU",
-NIU:"UUU",
-NFK:"UUU",
-MNP:"UUU",
-PLW:"UUU",
-PNG:"UUU",
-PCN:"UUU",
-WSM:"UUU",
-SLB:"UUU",
-TKL:"UUU",
-TON:"UUU",
-TUV:"UUU",
-VUT:"UUU",
-WLF:"UUU",
-
-ATA:"XXX",
-BVT:"XXX",
-HMD:"XXX",
-SGS:"XXX",
-}
-
-import fs from "fs"
-import {JSDOM} from "jsdom"
-
-function groupByContinent(svgFilePath) {
-    // Read the SVG file
-    fs.readFile(svgFilePath, 'utf-8', (err, data) => {
-        if (err) {
-            console.error('Error reading SVG file:', err);
-            return;
-        }
-
-        // Create a virtual DOM with JSDOM
-        const dom = new JSDOM(data);
-        const document = dom.window.document;
-
-        // Select the root <svg> element
-        const svgElement = document.querySelector('svg');
-
-        // Group <g> elements representing countries by continent
-        const world = {}; // Renamed continents object to 'world'
-        svgElement.querySelectorAll('g').forEach(countryGroup => {
-            const countryId = countryGroup.getAttribute('id');
-            if (countryId!= null){
-                const continentId = continents[countryId.replace(/\d/g, "")] || "XXX"; // Remove numbers from country ID to get continent ID
-                if (!world[continentId]) {
-                    world[continentId] = document.createElementNS('http://www.w3.org/2000/svg', 'g');
-                    world[continentId].setAttribute('id', continentId);
-                }
-                world[continentId].innerHTML += countryGroup.outerHTML;
-            }else{
-
-            console.log(countryId,countryGroup.outerHTML)
-            }
-        });
-
-        // Create new <g> elements for each continent
-        svgElement.innerHTML = '';
-        for (const continentId in world) {
-            svgElement.appendChild(world[continentId]);
-        }
-
-        // Output the modified SVG
-        fs.writeFile(svgFilePath, svgElement.outerHTML, 'utf-8', err => {
-            if (err) {
-                console.error('Error writing to SVG file:', err);
-                return;
-            }
-            console.log('SVG file updated successfully.');
-        });
-    });
-}
-
-
-// Example usage:
-const svgFileBasePath = "./app/src/main/assets/" ;
-groupByContinent(svgFileBasePath+ "webmercator01.svg");
-groupByContinent(svgFileBasePath+ "aeqd01.svg");
-groupByContinent(svgFileBasePath+ "loxim01.svg");

package.json

@@ -1,8 +1,10 @@
 {
+  "scripts": {
+    "pack": "node packmap.js mapdata/loxim01.geojson mapdata/webmercator01.geojson mapdata/aeqd01.geojson"
+  },
   "dependencies": {
     "@turf/area": "^7.3.5",
     "@turf/turf": "^7.3.5",
-    "jsdom": "^29.1.1",
     "mapshaper": "^0.7.22"
   },
   "type": "module"

packmap.js

@@ -0,0 +1,232 @@
+#!/bin/node
+
+/**
+ * Packs the generated map data into the compact binary the app reads.
+ *
+ * The app used to ship SVG, which spends about four megabytes per projection
+ * spelling coordinates out in decimal ASCII inside XML, and needed the map
+ * parsed as a document at startup. Nothing needs a document: the app wants a
+ * list of places and the outlines that belong to them, which is what this
+ * writes.
+ *
+ * Input is mapshaper's projected GeoJSON, where each feature carries:
+ *   CODE   the place it belongs to, e.g. "FRA" or "FRA_CE"
+ *   LEVEL  0 for a country outline, 1 for one of its regions
+ *
+ * Output format. All integers are LEB128 varints and coordinates are in grid
+ * steps, on a canvas MAP_WIDTH user units across:
+ *
+ *   "BMAP" 0x02
+ *   precision                         uvarint, grid steps per user unit
+ *   width, height                     uvarint, in grid steps
+ *   shapeCount                        uvarint
+ *   per shape:
+ *     codeLength, code                uvarint + UTF-8 bytes
+ *     flags                           1 byte, bit 0 = is a region
+ *     ringCount                       uvarint
+ *     per ring:
+ *       pointCount                    uvarint
+ *       flags                         1 byte, bit 0 = even-odd fill
+ *       pointCount pairs of dx, dy    zigzag varint, from the previous point,
+ *                                     starting from the origin on each ring
+ */
+
+import { readFileSync, writeFileSync } from 'fs'
+
+/** Canvas width in user units. Stroke widths in the app are relative to it. */
+const MAP_WIDTH = 800
+
+/** Blank edge left around the map, as mapshaper's own SVG output used to. */
+const MARGIN = 1
+
+/**
+ * Grid steps per user unit. Coordinates are snapped to this, so it sets how
+ * fine the map can be; it is written into the header rather than agreed by
+ * convention, so raising it only means regenerating the assets.
+ */
+const PRECISION = 20
+
+function uvarint(bytes, value) {
+  while (value >= 0x80) {
+    bytes.push((value & 0x7f) | 0x80)
+    value >>>= 7
+  }
+  bytes.push(value)
+}
+
+function svarint(bytes, value) {
+  uvarint(bytes, value < 0 ? -value * 2 - 1 : value * 2)
+}
+
+/** Every polygon of a feature, outer rings and holes alike. */
+function ringsOf(geometry) {
+  if (!geometry) return []
+  if (geometry.type === 'Polygon') return [geometry.coordinates]
+  if (geometry.type === 'MultiPolygon') return geometry.coordinates
+  return []
+}
+
+/**
+ * Groups features by the place they belong to. A country outline and its
+ * regions arrive as separate features; the code is what ties them together.
+ */
+function collect(features) {
+  const shapes = []
+  const byCode = new Map()
+
+  for (const feature of features) {
+    const code = feature.properties?.CODE
+    if (!code) continue
+    const polygons = ringsOf(feature.geometry)
+    if (polygons.length === 0) continue
+
+    let shape = byCode.get(code)
+    if (!shape) {
+      shape = { code, isState: feature.properties.LEVEL === 1, rings: [], seen: new Set() }
+      byCode.set(code, shape)
+      shapes.push(shape)
+    }
+    // A polygon with holes only reads correctly under an even-odd fill, which
+    // is the rule mapshaper's SVG output used to pick for the same reason.
+    const evenOdd = polygons.some((polygon) => polygon.length > 1)
+
+    for (const polygon of polygons) {
+      for (const ring of polygon) {
+        if (ring.length >= 3) shape.rings.push({ ring, evenOdd })
+      }
+    }
+  }
+  return shapes
+}
+
+/** Twice the signed area of a closed ring of `x, y` pairs. */
+function shoelace(points) {
+  let sum = 0
+  const count = points.length / 2
+  for (let i = 0, j = count - 1; i < count; j = i++) {
+    sum += points[j * 2] * points[i * 2 + 1] - points[i * 2] * points[j * 2 + 1]
+  }
+  return sum
+}
+
+/**
+ * Snaps every ring to the output grid and throws away what that makes
+ * redundant: points that land on the one before them, and rings left too small
+ * to enclose anything. The simplification upstream works to about this
+ * precision, so a good share of the raw points say nothing once rounded.
+ */
+function quantize(shapes, canvas) {
+  const kept = []
+  for (const shape of shapes) {
+    const seen = new Set()
+    const rings = []
+    for (const { ring, evenOdd } of shape.rings) {
+      const points = []
+      let px = null
+      let py = null
+      for (const [rx, ry] of ring) {
+        const x = canvas.x(rx)
+        const y = canvas.y(ry)
+        if (x === px && y === py) continue
+        points.push(x, y)
+        px = x
+        py = y
+      }
+      if (points.length < 6) continue
+      // Coordinates are integers now, so any ring that still encloses area
+      // encloses at least half a grid square. One that comes out at exactly
+      // zero is a sliver the rounding flattened, and it would draw nothing.
+      if (shoelace(points) === 0) continue
+      // Antarctica arrives twice over, once per admin level, because its source
+      // carries no country code and both levels land on ATA. A ring counted
+      // twice cancels itself out in the even-odd test the app hit tests with,
+      // which would leave the shape impossible to tap.
+      const key = points.join(',')
+      if (seen.has(key)) continue
+      seen.add(key)
+      rings.push({ points, evenOdd })
+    }
+    if (rings.length > 0) kept.push({ code: shape.code, isState: shape.isState, rings })
+  }
+  // By code, which puts a country next to its own regions. They are neighbours
+  // on the map, so their coordinates are similar, and the compressor in the APK
+  // gets noticeably more out of the file for it.
+  return kept.sort((a, b) => (a.code < b.code ? -1 : a.code > b.code ? 1 : 0))
+}
+
+/** Projected metres in, user units on a MAP_WIDTH canvas out, y flipped. */
+function fitToCanvas(shapes) {
+  let minX = Infinity
+  let minY = Infinity
+  let maxX = -Infinity
+  let maxY = -Infinity
+  for (const shape of shapes) {
+    for (const { ring } of shape.rings) {
+      for (const [x, y] of ring) {
+        if (x < minX) minX = x
+        if (x > maxX) maxX = x
+        if (y < minY) minY = y
+        if (y > maxY) maxY = y
+      }
+    }
+  }
+  const scale = (MAP_WIDTH - 2 * MARGIN) / (maxX - minX)
+  return {
+    width: MAP_WIDTH,
+    height: 2 * MARGIN + (maxY - minY) * scale,
+    x: (v) => Math.round((MARGIN + (v - minX) * scale) * PRECISION),
+    y: (v) => Math.round((MARGIN + (maxY - v) * scale) * PRECISION),
+  }
+}
+
+function pack(path) {
+  const geojson = JSON.parse(readFileSync(path, 'utf8'))
+  const collected = collect(geojson.features ?? [])
+  const canvas = fitToCanvas(collected)
+  const shapes = quantize(collected, canvas)
+
+  const bytes = [0x42, 0x4d, 0x41, 0x50, 0x02] // "BMAP" v2
+  uvarint(bytes, PRECISION)
+  uvarint(bytes, Math.round(canvas.width * PRECISION))
+  uvarint(bytes, Math.round(canvas.height * PRECISION))
+  uvarint(bytes, shapes.length)
+
+  let rings = 0
+  let points = 0
+  for (const shape of shapes) {
+    const code = Buffer.from(shape.code, 'utf8')
+    uvarint(bytes, code.length)
+    for (const byte of code) bytes.push(byte)
+    bytes.push(shape.isState ? 1 : 0)
+    uvarint(bytes, shape.rings.length)
+
+    for (const { points: ring, evenOdd } of shape.rings) {
+      uvarint(bytes, ring.length / 2)
+      bytes.push(evenOdd ? 1 : 0)
+      let px = 0
+      let py = 0
+      for (let i = 0; i < ring.length; i += 2) {
+        svarint(bytes, ring[i] - px)
+        svarint(bytes, ring[i + 1] - py)
+        px = ring[i]
+        py = ring[i + 1]
+      }
+      rings++
+      points += ring.length / 2
+    }
+  }
+
+  const out = path.replace(/^.*\//, './app/src/main/assets/').replace(/\.geojson$/, '.bmap')
+  writeFileSync(out, Buffer.from(bytes))
+  console.log(
+    `${out}: ${shapes.length} shapes, ${rings} rings, ${points} points, ` +
+      `${canvas.width}x${canvas.height.toFixed(1)}, ${bytes.length} bytes`,
+  )
+}
+
+const inputs = process.argv.slice(2)
+if (inputs.length === 0) {
+  console.error('usage: node packmap.js <map>.geojson ...')
+  process.exit(1)
+}
+inputs.forEach(pack)